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15 Cards in this Set
- Front
- Back
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Two portions of the skull
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Neurocranium
Viscerocranium |
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Features of the frontal bone
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Metopic Suture
Superciliary arch Glabella Supraorbital foramen/notch |
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Muscles of the scalp
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Frontalis m
Occipitalis m Epicranial aponeurosis |
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Muscles surrounding the eyes and mouth
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Obicularis oculi m (papebral and orbital portions)
Obicularis oris m Buccinator |
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Lip Elevators
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Levator labii superioris alaeque nasi m.
Levator labii superioris m. Zygomaticus minor m. Zygomaticus major m. Levator anguli oris m. |
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Lip depressing muscles
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Platysma m.
Mentalis m. Depressor labii inferioris m. Depressor anguli oris m. |
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Cutaneous branches of CN V on the face
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V1: supraorbital, supertrochlear, infratrochlear, lacrimal
V2: zygomaticotemporal, zygomaticofacial, infraorbital V3: auriculotemporal, buccal, mental |
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Facial a. path with branches
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External carotid -> facial a. -> inferior labial/superior labial -> angular a.
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Branches of Maxillary a.
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Mental a.
Inferior alveolar a. Infraorbital a. |
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Branches of Ophthalmic a.
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Supraorbital a.
Supratrochlear a. Dorsal nasal a. Angular a. |
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Path of the parotid duct
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Runs with transverse facial a. across the masseter, piercing the buccinator and opens opposite to the 2nd upper molar
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Parotid Gland Innervation
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Parasympathetic- stimulates the gland; preganglionic fibers in CN IX (passes through tympanic plexus and exits at lesser petrosal n through foramen ovale to reach otic ganglion); postganglionic fibers in CN V3 (auriculotemporal n)
Sympathetic- inhibits; postganglionic fibers run from superior cervical ganglion and course along branches of the external carotid a. to reach gland |
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Layers of scalp
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Skin- thin with numerous hair follicles, sweat and sebaseous glands
Connective Tissue- dense CT with vasculature Aponeurosis- Epicranial aponeurosis Loose CT- can become distended with fluid from injury or infection Periosteum |
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Nerves of the scalp
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V1: supraorbital, supertrochlear
V2: zygomatiotemporal V3: auriculotemporal Great Auricular, Lesser occipital, greater occipital |
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Why does the scalp bleed so much when cut?
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Since the vasculature is embedded in dense CT, the tissue pulls cut ends apart when transected
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