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33 Cards in this Set
- Front
- Back
What nerve supplies the mm of facial expression?
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facial nerve (AKA cranial nerve/CN VII)
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Facial nerve exits skull via
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stylomastoid foramen
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Facial nerve gives rise to five terminal branches...
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Temporal,
Zygomatic, Buccal, Mandibular, Cervical |
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Innervation of digastric posterior belly & stylohyoid mm?
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Facial nerve
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posterior auricular nerve is a branch of...
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facial nerve; it goes to mm of the auricle and occipitalis m
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Corneal blink reflex
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=closure of the eyelids;
AFFERENT limb of reflex is opthalmic div (I) of trigeminal (CNV) [sensory to eye]; EFFERENT limb of reflex is facial n (CN VII) |
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Bell's palsy
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paralysis of the fascial mm on the affected side bc of lesion of facial nerve;
marked by distortions of the face, decreased lacrimation, loss of taste in ant 2/3 of tongue, painful sensitivity to sounds, deviation of lower jaw & tongue |
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Trigeminal Nerve (CN V)
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provides sensory innernation to skin of face
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Branches of Trigeminal
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I: Opthalmic
II: Maxillary III: Mandibular |
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Opthalmic division of V (area of innervation + branches...)
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innervates area above upper eyelid & dorsum of nose;
branches are: supraorbital, supratrochlear, infratrochlear, external nasal, lacrimal |
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Maxillary division of V (area + branches)
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innervates face below the level of the eyes and above the upper lip;
branches are Zygomaticofacial, Zygomaticotemporal, Infraorbital |
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Mandibular division of V (area + branches)
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innervates face below the level of the lower lip;
branches include auriculotemporal, buccal, mental |
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Trigeminal neuralgia (tic douloureux)
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paroxysmal pain along course of trigeminal nerve, especially radiating to maxillary or mandibular area
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Facial artery (pathway)
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arises from External Carotid Artery above hyoid bone;
passes deep to mandible, winds around lower border of mandible, runs upward and forward on the face |
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Facial artery (branches in neck)
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ascending palatine, tonsillar, glandular, submental
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Facial artery (branches in face)
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inferior labial, superior labial, lateral nasal
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Anastomoses of facial artery w/ opthalmic artery
(connects what two main arteries?) |
facial terminates as angular artery that anastomoses w/ palpebral and dorsal nasal branches of opthalmic artery (establishes connection btw internal & external carotid)
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Superficial temporal artery (pathway)
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arises behind neck of mandible as smaller terminal branch of external carotid artery & ascends anterior to external acoustic meatus into scalp
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Superficial temporal artery accompanied what nerve?
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auriculotemporal
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Transverse facial artery is a branch of which artery?
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Superficial temporal artery
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Branches of Superficial Temporal Artery...
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transverse facial artery, zygomatico-orbital, middle temporal, anterior auricular, frontal, parietal
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Facial vein receives...
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supraorbital, supratrochlear (join to form angular), deep facial vein, infraorbital
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Facial vein drains into...
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IJV or joins anterior branch of retromandibular vein to form COMMON FACIAL VEIN
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Danger Area of Face
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area of face near the nose drained by facial veins; dangerous because skin infections on face can travel to cavernous venous sinus via facial vein; can cause SEPTICEMIA
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Retromandibular vein
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formed by union of superficial temporal vein and maxillary vein;
divides into anterior branch (joins facial to form common facial) & posterior branch (joins posterior auricular to form EJV) |
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Layers of SCALP
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Skin,
Connective tissue (Close Subcutaneous tissue), Aponeurosis epicranialis (galea aponeurotica), Loose connective tissue, Pericranium |
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Connective tissue (Close Subcutaneous tissue)
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composed of dense connective tissue that binds the skin to the underlying aponeurosis of occipitofrontalis m
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Aponeurosis epicranialis (galea aponeurotica)
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a Fibrous Sheet that covers the vault of the skill and unites the occipitalis and frontalis mm
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Loose connective tissue
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forms subaponeurotic space, contains the EMISSARY VEINS;
termed dangerous area bc infection can spread easily in it or from scalp to intracranial sinuses by way of emissary veins |
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Pericranium
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periosteum over surface of skull
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Scalp hemorrhage
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results from laceration of arteries in the dense subcutaneous tissue that are unable to contact or retract and thus remain open, leading to profuse bleeding
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Innervation of scalp
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supratrochlear, supraorbital, zygomaticotemporal, auriculotemporal, lesser occipital, greater occipital, third occipital nerves
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Blood Supply to Scalp
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supratrochlear, supraorbital (pf internal carotid);
superficial temporal, posterior auricular, occipital (of external carotid) |