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The cn ii and ophthalmic artery laterally the

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the CN II and ophthalmic artery; laterally, the superior orbital fissure permits passage of several cranial nerves Anterior Landmarks:Supraorbital: CN V1; Infraorbital: CN V2, Mental: CN V3, Glabella, Nasion and Piriform aperture Lateral Landmarks Superior temporal line, inferior temporal line, pterion, zygomatic arch, styloid process, mastoid process, zygomatic facial foramen (CN V2), infraorbital foramen CN V2, and mental nerve (CN V3)Foramina in Middle fossa: superior orbital fissure, inferior orbital fissure, foramen rotundum, foramen ovale, foramen spinosum, foramen lacerum, carotid canal, hiatus for lesser and greater petrosal nerve Inferioir Landmarks: Lateral and medial pterygoid plates, hamulus of medial pterygoid plate, zygomatic arch, mandibular fossa, choanae, styloid process, occipital condyles, and mastoid processSuperior foramina: Anterioir:cribriform plate (CN I), optic canal (CN II), foramen cecum. Posterior:Internal acoustic meatus (CN VII and VIII), Jugular foramen, hypoglossal canal, foramen magnum Foramen of CN V Superior orbital fissure (V1), foramen rotundum (V2), and foramen ovale (V3)Neck – extends from the base of skull to top of thorax, includes the manubrium, clavicle, 7 cervical vertebrae, cartilaginous structures and hyoid bone (floating bone)Landmarks and muscle attachments: Skull: mastoid and styloid process of temporal bone; Mandible: ramus, body and angle; Hyloid (C3): body, lesser horn, and greater horn, thyroid (C4) and cricoid (C6) cartilages of larynx. Divided by sternocleidomastoid muscleinto 2 triangleswhich are covered by the platysma muscle, superficial fascia and skin: 1.Posterior triangle anteriorly:bounded by the posteriormargin of the sternocleidomastoid muscle (SCM), inferiorly: the middle 1/3 of the clavicle and posteriorly: the anterior margin of the trapezius muscle2.Anterior Triangle b/w the sternocleidomastoid muscle and midline of neckSuperficial veins1.Retromandibular vein – formed by maxillary and superficial temporal vein a.Divides at the angle of the mandible into anterior and posterior branches i.Facial vein joins anterior branchto form the common facial vein (passes to sternocleidomastoid muscle and drains in internal jugular vein)ii.Posterior branchcontinues as the external jugular veinacross sternocleidomastoidmuscle, receives tributaries (anterior jugular, transverse cervical, and suprascapular veins) before empting into subclavian vein. ** transverse cervical and suprascapular vein contribute to the draining into the external jugular vein 2.Communicating veinallows drainage from anterior jugular vein into the external jugular vein Large Deep Veins Internal jugular vein (very large)- found deep to the SCM (Sternocleidomastoid muscle) and Subclavian vein –join, posteriorly, to the sternoclavicular joint to form the brachiocephalic vein.

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Term
Fall
Professor
Thierry Bacro
Tags
Anatomy, Internal carotid artery, Accessory nerve, Facial nerve, Internal jugular vein

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