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SSN ANATOMY 5 ANSWER KEY Natalie Yip (nhy1) & Matt Baldwin (mrb45) January 23, 2000 Superficial Head & Neck: The beginnings… 1. What are the layers of the scalp? S C A L P 2. CRANIAL FOSSAE! Foramen Olfactory Foramina Location Ethmoid Bone Contents Foramen Cecum Optic Canal btw ethmoid and frontal bones Sphenoid bone - Superior Orbital Fissure Sphenoid bone - Foramen Rotundum Foramen Ovale Foramen Spinosum Foramen Lacerum Sphenoid bone Sphenoid bone Sphenoid bone btw Sphenoid and temporal b. - Hiatus of Facial Canal Internal Auditory Meatus Temporal bone Temporal bone - Jugular foramen btw Temporal and occipial b. - Hypoglossal Canal Occipital bone - 1 3. CSF! Please label the following, and trace the path of CSF through the ventricular system and then the path of fluid in the venous system. Straight Sinus Superior Sagittal Sinus Transverse Sinus Lateral Ventricle Third Ventricle Fourth Ventricle Aqueduct of Sylvius Foramen of Monro VENTRICULAR: VENOUS: 2 Foramen of Magendie Subarachnoid Space Arachnoid Villi Choroid Plexus 4. CRANIAL NERVES: Start learning this NOW! Name Motor/Se nsory Function Foramen I II III IV V VI VII VIII IX X XI XII Mnemonics: “Oh, Oh, Oh, To Touch And Feel Virgin Girls Vaginas And Hymens” (G-rated version):“Oh Once One Takes The Anatomy Final A Good Vacation Seems Heavenly” “Some Say Marry Money But My Brother Says Big Boobs Matter More” 3 5. CRANIAL NERVES: A Developmental Approach Branchial Arch Derivatives (the cranial nerves that have both sensory and motor functions.) Branchiomeric nerves: have Pretrematic branches : Sensory , Motor or Both? Post-trematic branches: Sensory, Motor or Both ? Branchial Bone Arch First Arch - Mandible - Sphenomandibular lig. - Malleus - Incus Second Arch - Hyoid lesser horn ligament - Styloid process - Stapes - Hyoid body and greater horn - Stylohyoid Third Arch Muscle - Mm of mastication - Tensor tympani m. - Tensor palatini m. - Mylohyoid m. - Digastric (ant. belly) - Mm of facial expr. - Stylohyoid m. - Digastric (post. belly) - Stapedius m. - Stylopharyngeus m. Fourth Arch - Laryngeal Cartilages - Pharyngeal mm. - Cricothyroid m. Sixth Arch - Laryngeal Cartilages - Laryngeal 6. HEMATOMAS! Subdural: Cause: Symptoms: Epidural: Cause: Symptoms: Subarachnoid: Cause: Symptoms: 4 mm. Innervation (Pre and Post) CN: Pre: Post: CN: Pre: Post: CN: Pre: Post: CN: Pre: Post: CN: Pre: ??? Post: 7. EXTRAOCULAR MUSCLES! (What do they do to the eyeball? And what is the innervation?.) Muscle Primary Action Secondary Action (Normally Innervation canceled out) Superior Rectus Inferior Oblique Inferior Rectus Superior Oblique Medial Rectus Lateral Rectus Levator Palpebrae Superioris 8. Cervical Plexus! Please label the following: Mm of Tongue CN XII Sternothyroid m. Supraclavicular N. Omohyoid m. Lesser Occipital N. Sternohyoid m. Phrenic N. Trapezius m. Transverse Cervical N. 5 SCM m. Ansa Cervicalis Geniohyoid /Thyrohyoid Mm. C1 C2 C3 C4 C5 6