BIOL 030 Lecture Notes - Lecture 8: Internal Auditory Meatus, Stylomastoid Foramen, Inferior Orbital Fissure
17 May 2020
School
Department
Course
Professor
Biol 30
Cos
Human Anatomy
Fossas Fig 7.9 in book
● Anterior holds frontal lobe of brain
● Middle holds temporal lobes of brain
● Posterior holds cerebellum of brain
Facial Bones “Monkeys in New Zealand like peaches very much.”
● Maxilla 2 largest facial bones, upper jaw & surround inferior nasal
● Mandible 1 lower jaw bone, strongest bone in skull
● Lacrimal 2 medial wall of each orbit, smallest bone of skull
● Zygomatic 2 cheekbones
● Vomer 1 inferior portion of nasal septum, looks like blade of plow
● Nasal 2 bridge of nose
● Palatine 2 Posterior Nasal Cavity
Openings – know the function or structure through the opening Table 9.1
● External Auditory Meatus Opening for sound transmission
● Internal auditory meatus CN VII & VIII
● Foramen Lacerum Internal Carotid Artery
● Foramen rotundum CN V2
● Foramen ovale CN V3
● Foramen spinosum meningeal blood vessels
● Superior orbital fissure CN III, IV, VI
● Inferior orbital fissure CN V2
● Optic canal CN II
● Jugular foramen CN III, IV, VI, internal jugular vein
● Hypoglossal foramen CN XII
● Foramen magnum (Big Hole) Spinal Cord, brain stem, vertebral arteries
● Stylomastoid foramen CN VII exits skull
Cranial Nerves: Know function Table 16.2
● I Olfactory Sensory smell information from nose to brain
● II Optic Sensory vision information from eye to brain
● III Oculomotor Motor info from brain to most eye muscles
● IV Troclear motor info from brain to superior oblique muscle of eye
● V Trigeminal both sensory & motor info
o V1 ophthalmic eye
o V2 maxillary upper jaw
o V3 mandibular lower jaw
● VI Abducens motor info from brain to lateral rectus eye muscle
● VII Facial sensory taste info from anterior tongue to brain and motor info to facial
muscles
● VIII Vestibulococlear sensory hearing & equilibrium info from ear to brain
● IX Glossopharyngeal mixed nerve of tongue & throat, posterior tongue taste
● X Vagus Control ANS & sensory functions of heart, digestive, spleen and kidneys
● XI Spino-accessory motor info to neck and back
Document Summary
Facial bones monkeys in new zealand like peaches very much. Maxilla 2 largest facial bones, upper jaw & surround inferior nasal. Mandible 1 lower jaw bone, strongest bone in skull. Lacrimal 2 medial wall of each orbit, smallest bone of skull. Vomer 1 inferior portion of nasal septum, looks like blade of plow. Openings know the function or structure through the opening table 9. 1. External auditory meatus opening for sound transmission. Internal auditory meatus cn vii & viii. Superior orbital fissure cn iii, iv, vi. Jugular foramen cn iii, iv, vi, internal jugular vein. Foramen magnum (big hole) spinal cord, brain stem, vertebral arteries. I olfactory sensory smell information from nose to brain. Ii optic sensory vision information from eye to brain. Iii oculomotor motor info from brain to most eye muscles. Iv troclear motor info from brain to superior oblique muscle of eye.
