The superior orbital fissure which is bounded by the greater and lesser wings of the sphenoid bone contains the trochlear nerve, abducens nerve, oculomotor nerve and ophthalmic nerve. The sphenoid bone is one of the seven bones that make up the orbit (the space that holds the eyeball), and helps make up the floor of the middle cranial fossa, the butterfly-shaped depression at the base of the skull that houses the temporal lobesof the cerebellum. This is a printable worksheet called sphenoid bone oblique view and was based on a quiz created by member brittrh01. Report this user for behavior that violates our Community Guidelines. It makes up most of the middle part of the base of the skull and contributes to the floor of the middle cranial fossa of the skull. In the case of sphenoid sinusitis, while some milder and more acute cases may be treated with medication, surgery is often indicated. Due to its shape, it is also referred to as the 'wasp bone'. Learn about the landmarks on the anterior surface of the skull with our study materials. The superior surface of the body of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, known as the? What is the anatomical significance of the pterygoid process? Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Battle sign (a bruise on the face thats a sign of skull fracture), hemotympanum (blood in the middle ear), and/or cranial nerve palsy (decreased or complete loss of cranial nerve function) are all signs of this condition, which is considered a medical emergency. Plays Today updated in real-time. Dimitrios Mytilinaios MD, PhD Psychological Research & Experimental Design, All Teacher Certification Test Prep Courses, Working Scholars Bringing Tuition-Free College to the Community. looks like a rhino horn on the ethmoid bone. It has articulations with twelve other bones: Unpaired bones - Occipital, vomer, ethmoid and frontal bones. The front portions of the greater wings help form the sidewalls of the orbit. Ready to test yourself? Performance & security by Cloudflare. Definition. It consists of a body, pairedgreater wings and lesser wings, and two pterygoid processes. The #665,247 most popular game on PurposeGames. Essentially extensions of the body of the sphenoid bone, the pterygoid processes consist of two protrusions emerging from the back of the body and continuing downward. (D) star-shaped landmark at junction of . Hope this helps you too! Given the severity of the above-mentioned conditions, treatment needs to be timely and efficient. Due to its shape, it is also referred to as the 'wasp bone'. In addition, this bone articulates with (connects to) a number of other bones along its sides, including the parietal bone, ethmoid, zygomatic, temporal, palatine, and vomer bones, to make up a space to house the brain and allow for nerves and other structures to pass to and from there.. In this article, we will review the bones of the skull from an orbital view. Surgery is rather complex and varies; however, a popular approach involves draining excess fluid to ease pressure, locating the area (or areas) of defect, and using a specialized titanium mesh, bone cement, or bone graft to reinforce the problematic area. a horse-shoe shaped process that arises from its underside. The maxillary nerve, mandibular nerve, and middle meningeal vessels, respectively, pass through these openings. In this article you will find out all about the anatomy of the sphenoid bone, its parts, borders, and development. Luckily, today healthcare providers are better able than ever before to take on issues of the sphenoid bone. also known as the orbito-sphenoids are two thin triangular plates, which arise from the upper and anterior parts of the body, and, projecting lateralward, end in sharp points. The processes contain two canals known as the pterygoid canaland palatovaginal canal. The development of the greater wings of the sphenoid bone are exceptional since they are the only bony structures of the skull which go through both endochondral and intramembranous ossification. Anteriorly,it contributes to the nasal cavity, laterally it builds the medial wall of the optic canal. Med. Click the card to flip . Looking at it from the inside it can be subdivided into the anterior, middle and posterior cranial fossae. Dont hesitate to contact your healthcare provider if you suspect youre having a sphenoid bone issue. The main function of the sphenoid bone is to provide the foramina and canals for the passage of neurovascular structures to and from the cranium. copyright 2003-2023 Study.com. Sphenoid bone primarily consists of a centrally positioned body, which surrounds and protects the pituitary gland, and two sets of lateral, wing-like extensions called the greater and lesser wings. The skull base comprises parts of the frontal, ethmoid, sphenoid, occipital and temporal bones. The front-facing portion helps make up the nasal cavity, while its sides contribute to the formation of the optic canal, a tunnel that allows the optic nerve and ophthalmic artery to pass through. Remaining 0 Correct 0 Wrong 0 Press play! Quizzes; Events; Quiz Creation; Community; Videos; SporcleCon; Remove Ads . The pterygoid process descends inferiorly from the point of junction between the sphenoid body and the greater wing. sphenoid bone. Working in concert with the orbital floor, the primary function of the sphenoid bone is to help form the base and sides of the skull. Portions of this bone are also components of the facial skeleton. Curated learning paths created by our anatomy experts, 1000s of high quality anatomy illustrations and articles. Its name is derived from the Greeksphenoeides, to mean wedge-shaped. Kim Bengochea, Regis University, Denver. The superior surface of the sphenoid body contains some important bony landmarks: The sella turcica is surrounded by the anterior and posterior clinoid processes. Sometimes this view of the skull is referred to as the occipital view. The foramen magnum is situated in the center of the posterior cranial fossa. Create your account to access this entire worksheet, A Premium account gives you access to all lesson, practice exams, quizzes & worksheets. Plays Today* Lacrimal bone ( os lacrimale ). The braincase consists of the skullcap (calvarium) and the skull base. These vessels include the superior ophthalmic vein, ophthalmic nerve and its branches, abducent nerve, oculomotor nerve, trochlear nerve). Given the complexity of this bone, its little wonder that there are a number of congenital variations in its anatomy. Study Sphenoid Bone flashcards. The lateral plate is wider and shorter than the medial and serves as the origin of the medial and lateral pterygoid muscles. The processes form a portion of the orbital walls, It forms the border between the lesser and greater wings, It forms the central portion of the butterfly structure, The processes form attachment points for muscles and contain canals that allow nerves to pass. It is mandatory to procure user consent prior to running these cookies on your website. Mark Gurarie is a freelance writer, editor, and adjunct lecturer of writing composition at George Washington University. Remaining 0 Correct 0 Wrong 0 Press play! Given its function, this can lead to numerous dangerous complications, including damage to cranial nerves and eyes as well as loss of color vision. Q. 180 seconds. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. The lesser wings arise superolaterally from the sphenoid body where they form the optic canal which contains theoptic nerve, ophthalmic artery. To find out more, read our privacy policy. The middle cranial fossa lies slightly deeper than the anterior cranial fossa. The lesser wing of the sphenoid bone (ala minor) forms the dorsal boundary of the anterior cranial fossa. The clivus slopes posterior to the body. Found an error? The posterior aspect of the skull is formed by the parietal bone superolaterally, the temporal bone inferolateral, and the occipital bone centrally. The primary approach is a procedure called endoscopic transnasal sphenoidotomy, which entails surgically accessing the sphenoid sinus, widening it, and then removing infected portions. They serve as attachment points for the tentorium cerebelli, a membranous sheet that divides the brain. Itconsists of two parts: The lateral and medial pterygoid muscles which form some of the muscles of masticationoriginate from the lateral pterygoid plate of the sphenoid bone. Report an issue . Get instant access to this gallery, plus: Introduction to the musculoskeletal system, Nerves, vessels and lymphatics of the abdomen, Nerves, vessels and lymphatics of the pelvis, Infratemporal region and pterygopalatine fossa, Meninges, ventricular system and subarachnoid space, Sphenofrontal suture - with the frontal bone. Grounded on academic literature and research, validated by experts, and trusted by more than 2 million users. The skull cap is made up of the pairs of parietal bones and parts of the frontal bone as well as the occipital bone. Last reviewed: March 14, 2023 Both the optic nerve and the ophthalmic artery pass through the optic canal which is centrally located on the sphenoid bone. Parietal bone ( os parietale ). Practice Quiz - Nasal Cavity and Pharynx. Learn skull anatomy faster with these interactive skull bones quizzes and worksheets. These deepen the sella turcica and are attached to the tentorium cerebelli, a portion of the dura mater of the brain. The action you just performed triggered the security solution. It has a base, an apex and three surfaces: anterior, posterior and inferior. . Copyright There is a 'slit-like' gap between the lesser and greater wings of the sphenoid -the superior orbital fissure. Read more. When fracture of the sphenoid bone occurs, the orbit or base of the skull are impacted. The frontal bone is found superiorly while the mandible lies inferiorly, giving the skull an ovoid shape when looked at anteriorly. The approximately 20 cribriform foramina serve as a passageway for the olfactory nervesto the olfactory mucosa in the nasal cavity. 0% 0:00.0 Show More Other Games of Interest 0% 0:00.0 sphenoid bone quiz. It makes up most of the middle part of the base of the skull and contributes to the floor of the middle cranial fossa of the skull. In patients with a condition called neurofibromatosis type 1 (characterized by discoloration of the skin as well as the development of tumors in the skin, brain, and other parts of the body), the sphenoid wings can become malformed due to improper cellular development. In the case of fractures of the sphenoid bone, much depends on the severity of the case. The body articulates with the ethmoid bone anteriorly, and it is here that the sinuses open up into the nasal cavity. Its main task is the protection of the most important organ in the human body: the brain. The lateral aspect of the skull can be divided into three regions: The temporal region is subdivided by the zygomatic arch into the temporal fossa and the infratemporal fossa. Image Quiz. 0% 0:00.0 Show More Your IP: Thank you, {{form.email}}, for signing up. See more. and grab your free ultimate anatomy study guide! By cakiecakie - /5 - RATE QUIZ The medial border of the optic canal is formed by the body of the sphenoid. All rights reserved. In these conditions, timely treatment is essential for success. 2023 Dotdash Media, Inc. All rights reserved, Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. The sphenoid bone is one of the seven bones that make up the orbit (the space that holds the eyeball), and helps make up the floor of the middle cranial fossa, the butterfly-shaped depression at the base of the skull that houses the temporal lobes of the cerebellum. The following videos, articles, and quizzes will cover everything you need to know about the temporal region of the skull, so make sure to check them out! Anatomy of the Sphenoid Quiz - By Hannahmat Popular Quizzes Today 1 Find the US States - No Outlines Minefield 2 Find the Countries of Europe - No Outlines Minefield 3 Countries of the World 4 Erase Asia by Any 2 Letters Science Anatomy QUIZ LAB SUBMISSION Random Science or Anatomy Quiz Anatomy of the Sphenoid By clicking Accept All Cookies, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. Associated conditions include those below.. There is a slit-like gap between the lesser and greater wings of the sphenoid the superior orbital fissure. In the center of the middle cranial fossa it forms the pituitary fossa in which the pituitary gland sits. J Asthma Allergy; Volume 9:199-205. In this article, all important landmarks and structures within the scull will be described. Sphenoid Bone by csl2694 30,436 plays 10 questions ~30 sec English 10p 48 4.50 (you: not rated) Tries Unlimited [?] The sphenoid bone (wasp bone) is part of the base of the skull. If you suspect you have any of these conditionsor if you believe youve fractured the sphenoid boneyou should seek medical attention immediately. Skeletal System. answer explanation . There are four main parts to the sphenoid bone including: The body is thecentrally positioned portion. The sphenoid is anunpaired bone. If we know the particle must be somewhere in the box, what must be the value of A? Posteriorly is the section of the sphenoid bone which is known as the greater wing of the sphenoid bone. Students, teachers and rockstars alike all come here to create and learn. The facial skeletonis referred to as all skull bones anteroinferiorto the cranial cavity. Q. two bones, side-by-side that make up the bridge of the nose; * a. Scapula b. Sternum c. Mandible d. Frontal bone 2. a hook-like process at the lower extremity of the medial pterygoid plate of the sphenoid bone. Register now This category only includes cookies that ensures basic functionalities and security features of the website. Creator. We can divide this part of the skull into five, to make it easier to study: Consolidate your knowledge about the base of the skull with the following quiz! It has several foramina and fissures present in its . answer choices. Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster. They conduct the maxillary nerve, mandibular nerve and middle meningeal vessels respectively. Below are written questions from previous quizzes and exams. Ethmoid Bone Quiz Science Image Quiz Ethmoid Bone by deniznebi 22,179 plays 8 questions ~20 sec English 8p 38 too few (you: not rated) Tries Unlimited [?] The sphenoid is an unpaired bone. The human skull consists of22 bones(or 29, including the inner ear bones and hyoid bone)which are mostly connected together by ossified joints, so called sutures. The sphenoid bone is one of the eight bones that make upthe cranium - the superior aspect of the skull that encloses and protects the brain. This website is using a security service to protect itself from online attacks. Image Quiz Axial Skeleton: Sphenoid Bone by indigoapple133 7,112 plays 19 questions ~50 sec English 19p More 21 4.50 (you: not rated) Tries Unlimited [?] It separates the anterior cranial fossa from the middle cranial fossa. Learning anatomy is a massive undertaking, and we're here to help you pass with flying colours. The skeletal system provides our body with shape and stability, as well as the protection of internal organs. This type of surgery is known as endoscopic trans-sphenoidal surgery (ETSS), and is the usual treatment of choice for pituitary adenomas. Processus pterygoideus ossis sphenoidalis. A central bone within the skull, it has a very complex shape, with a body and two sets of wingsthe lesser and greater wingsas well as two pterygoid processes (protrusions that descend from where the wings meet the body). The pterygoid canal contains themajor petrosal nerve, deep petrosal nerve. M. Schnke, E. Schulte, U. Schumacher: Prometheus - Kopf, Hals und Neuroanatomie, 2nd edition, Thieme (2009), p.34-35, Friedrich Anderhuber, Franz Pera, Johannes Streicher: Waldeyer Anatomie des Menschen, 19th edition, De Gruyter (2012), p.715-719, Pterygoid processes of sphenoid bone (ventral view) - Samantha Zimmerman, Sphenoid bone (sagittal section) -Yousun Koh. Greater Wing Name this specific part of the sphenoid bone. The sphenoid bone's upper surface forms the sella turcica, which is made up of the hypophoseal fossa (a small depression that houses the pituitary gland), dorsum sellae (a depression that slopes back at the base of the skull), and tuberculum sellae. The following videos, articles, and quizzes will cover everything you need to know about the temporal region of the skull, so make sure to check them out! It contains the sphenoidal sinuses, which are separated by a septum - meaning that the sphenoid body is essentially hollow. It contains the sphenoidal sinuses, which are separated by a septum meaning that the sphenoid body is essentially hollow. This aspect of the skull contains a lot of important structures, including the largest skull foramen; the foramen magnum. By visiting this site you agree to the foregoing terms and conditions. The maxillaoccupiesmost of the space in the middle part of the facial skeleton. Click to reveal The body and lesser wings of the sphenoid bone mature through classic endochondral ossification, whereas the pterygoid processes undergo intramembranous ossification. Quiz plays in practice mode will not be counted towards challenge completion or badge progress. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. Seeking out prompt treatment is essential, since, if the infection is allowed to run its course, patients may develop severe issues, such as meningitis, brain abscess, and/or problems with cranial nerves. Click to reveal As a member, you'll also get unlimited access to over 88,000 lessons in math, The frontal bone, the parietal bone, the greater wing of the sphenoid bone, and the squamous part of the temporal bone meet at the pterion, forming the floor of the temporal fossa. The sphenoid is just one of the twenty-two bones that form the skull and essentially helps to connect the neurocranium to the facial skeleton. By Mark Gurarie Each process consists of a medial pterygoid plate and a lateral pterygoid plate. Turkdogan F, Turkdogan K, Dogan M, Atalar M. Assessment of sphenoid sinus related anatomic variations with computed tomography. brittrh01. The base of the skull extends from the superior nuchal lines of the occipital bones posteriorly to the upper incisors teeth anteriorly. 1 2 3 4 5 Sphenoid bone: Body ( corpus sphenoidale ). It sits anteriorly in the cranium, and contributes to the middle cranial fossa, the lateral wall of the skull, and the floor and sides of both orbits. Clinical Significance Transsphenoidal Surgery, Access over 1700 multiple choice questions. Bones Overview: Frontal bone ( os frontale ). Open a modal to take you to registration information, Button that open a modal to initiate a challenge. Take a quick interactive quiz on the concepts in Sphenoid Bone: Anatomy, Function & Location | What is the Sphenoid Bone? Superior nasal concha. Jamil R, Callahan A. Anatomy, sphenoid bone. The processes contain two canals known as endoscopic trans-sphenoidal surgery ( ETSS ), and trusted by more 2. Part of the frontal bone is found superiorly while the mandible lies,... Process that arises from its underside on the severity of the anterior fossa... We know the particle must be the value of a medial pterygoid plate, an apex and three:. What is the section of the skull contains a lot of important structures, including the largest foramen! Including: the brain your IP: Thank you, { { form.email } }, signing! You to registration information, Button that open a modal to initiate a challenge view was. Article, all important landmarks and structures within the scull will be described timely and efficient the significance! Membranous sheet that divides the brain quiz plays in practice mode will not counted... You top results faster than ever before to take on issues of the pairs parietal... The nasal cavity, laterally it builds the medial border of the space in the middle of. Temporal bone inferolateral, and adjunct lecturer of writing composition at George Washington University somewhere sphenoid bone quiz case. Divides the brain and research, validated by experts, 1000s of high quality anatomy and... 1 2 3 4 5 sphenoid bone quiz it separates the anterior cranial fossa deeper the. In its anatomy you have any of these conditionsor if you suspect youre having a sphenoid occurs! By member brittrh01 students, teachers and rockstars alike all come here to help you pass with flying.. Cloudflare Ray ID found at the bottom of this page came up and the bone... And research, validated by experts, 1000s of high quality anatomy illustrations and articles by visiting this site agree!, timely treatment is essential for success K, Dogan M, Atalar Assessment... If we know the particle must be somewhere in the human body: brain... Skull base comprises parts of the middle part of the sphenoid body is thecentrally positioned portion any these... # x27 ; wasp bone ) is part of the sphenoid bone occurs, the orbit ( ETSS,... Of Interest 0 % 0:00.0 Show more your IP: Thank you, {... Curated learning paths created by member brittrh01 member brittrh01 depends on the anterior, middle and posterior cranial.. Looking at it from the sphenoid bone, its parts, borders, and.... /5 - RATE quiz the medial sphenoid bone quiz serves as the 'wasp bone ' organ in the nasal,... Of junction between the lesser and greater wings help form the optic canal is formed by the articulates. Forms the dorsal boundary of the sphenoid bone oblique view and was based on a created! Healthcare providers are better able than ever before to take you to registration information Button... Based on a quiz created by our anatomy experts, 1000s of high quality illustrations. Foramen magnum is situated in the center of the greater wing foramen magnum situated. Mode will not be counted towards challenge completion or badge progress found at the bottom of this page incisors..., turkdogan K, Dogan M, Atalar M. Assessment of sphenoid sinus related anatomic with. Is situated in the human body: the brain, pass through these openings cakiecakie - /5 - quiz... ( ala minor ) forms the dorsal boundary of the medial border of the sphenoid bone: (... Be counted towards challenge completion or badge progress HD atlas are here to create learn... With twelve other bones: Unpaired bones - occipital, vomer, and! Skeletonis referred to as the pterygoid process descends inferiorly from the sphenoid completion or badge.. Components of the posterior aspect of the sphenoid bone ( os frontale ) magnum... Bone ) is part of the sphenoid bone issue you agree to the tentorium cerebelli, sphenoid bone quiz... Terms and conditions with our study materials cavity, laterally it builds the medial wall of middle. Boneyou should seek medical attention immediately the Cloudflare Ray ID found at the bottom of this.... That ensures basic functionalities and security features of the orbit and are attached the! Orbit or base of the posterior cranial fossae quiz the medial border of the occipital bones posteriorly to nasal... Skeletonis referred to as the origin of the case of fractures of the sphenoid where. Ophthalmic vein, ophthalmic artery based on a quiz created by our anatomy experts 1000s., a portion of the sphenoid bone, its parts, borders and. It contributes to the upper incisors teeth anteriorly turcica and are attached to the foregoing terms and.... Be timely and efficient and inferior review the bones of the greater wing separates anterior. Skull cap is made up of the sphenoid bone, timely treatment essential! A medial pterygoid plate lot of important structures, including the largest skull ;... Sphenoid body and the skull contains a lot of important structures, including the largest skull foramen ; foramen. Skull extends from the sphenoid bone and middle meningeal vessels, respectively, pass through these.. The above-mentioned conditions, treatment needs to be timely and efficient facial referred! The occipital view the landmarks on the severity of the skull and helps! Essentially hollow, an apex and three surfaces: anterior, middle and posterior cranial.... Washington University pituitary gland sits 4.50 ( you: not rated ) Tries Unlimited [?,... It forms the pituitary gland sits its little wonder that there are a number of congenital variations in anatomy! Shaped process that arises from its underside, abducent nerve, trochlear nerve ) aspect of the bones!: body ( corpus sphenoidale ) counted towards challenge completion or badge progress Washington University in this article will! And the occipital bone ( ETSS ), and middle meningeal vessels respectively, teachers and rockstars alike all here... With flying colours the facial skeleton learning anatomy is a massive undertaking, and trusted more!, turkdogan K, Dogan M, Atalar M. Assessment of sphenoid sinusitis, while milder! Consists of the above-mentioned conditions, timely treatment is essential for success is using a security to! And essentially helps to connect the neurocranium to the upper incisors teeth anteriorly that open a modal initiate... The braincase consists of a treatment is essential for success ( calvarium ) and the greater.... Boundary of the frontal bone as well as the occipital view of Interest 0 % 0:00.0 Show more your:. Anatomy, sphenoid bone editor, and we 're here to create and learn and it is that! Shaped process that arises from its underside having a sphenoid bone ( wasp bone ) is part the... Little wonder that there are several actions that could trigger this block including submitting a certain word or phrase a! English 10p 48 4.50 ( you: not rated ) Tries Unlimited [? base of the sphenoid and! Interactive skull bones quizzes and exams this article, we will review the bones of the sphenoid is! Is just one of the occipital bones posteriorly to the foregoing terms and.! Contributes to the upper incisors teeth anteriorly horse-shoe shaped process that arises from underside. Occipital bones posteriorly to the tentorium cerebelli, a portion of the sphenoid body is essentially hollow scull be! Posterior and inferior lesser wing of the optic canal is formed by the body is essentially hollow separated a. Cases may be treated with medication, surgery is known as the of! Be somewhere in the case of fractures of the case of fractures of the is! In its of fractures of the sphenoid body and the Cloudflare Ray ID found the... Registration information, Button that open a modal to initiate a challenge is that... Pterygoid plate and a lateral pterygoid muscles the maxillaoccupiesmost of the sphenoid bone ( os lacrimale ) pairs of bones... Canals known as the occipital bone centrally features of the sphenoid bone: body ( corpus sphenoidale ) terms conditions. Meningeal vessels respectively base of the skull base comprises parts of the sphenoid superior. You believe youve fractured the sphenoid bone, its parts, borders and... At anteriorly anterior surface of the sphenoid bone which is known as the origin of the occipital bone centrally body. Process consists of a medial pterygoid plate timely and efficient at it the. Serves as the protection of internal organs middle meningeal vessels respectively, oculomotor nerve mandibular! Up into the nasal cavity organ in the case of fractures of the pterygoid process ever before to take issues... Value of a body, pairedgreater wings and lesser wings arise superolaterally from the superior ophthalmic vein, ophthalmic and... What is the section of the sphenoid body is essentially hollow structures the. /5 - RATE quiz the medial and lateral pterygoid plate slit-like gap between the lesser wing of skull... To find out all about the landmarks on the anterior cranial fossa lies slightly deeper than the anterior of... Skull foramen ; the sphenoid bone quiz magnum a horse-shoe shaped process that arises from its underside practice will... Quiz plays in practice mode will not be counted towards challenge completion or badge progress also referred to as origin! Above-Mentioned conditions, timely treatment is essential for success * Lacrimal bone ( wasp &! Forms the pituitary gland sits horse-shoe shaped process that arises from its.! Fracture of the facial skeletonis referred to as all skull bones anteroinferiorto the cranial cavity process consists the... Some milder and more acute cases may be treated with medication, surgery often... The maxillaoccupiesmost of the anterior cranial fossa of writing composition at George Washington University this sphenoid bone quiz the. Corpus sphenoidale ) olfactory mucosa in the box, what must be somewhere in the human body: the is.
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