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Head & Neck SG

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QuestionAnswer
Where do most cranial nerves arise from? Where do CN I and II arise from? brainstem, cerebrum
Which nerve goes to areas of the body besides the head and neck Vagus
Which nerves are relevant to dentistry? V, VII, IX, X, XII
Define Nerve bundle of fibers made up of several neurons
Define nucleus as it relates to nerves collection of nerve cell bodies in the CNS
Define ganglion collection of nerve cell bodies outside the CNS
What is CN I responsible for? Sense of smell
What are CN II, III, IV, and VI responsible for? eye movement and vision (only CN II)
What is CN VIII responsible for? hearing and equilibrium
What does CN IX innervate? stylopharyngeus muscle (motor), posterior 1/3 of tongue for taste and sensation (spec. sense), mucous membranes of the pharynx for sensation of swallowing (sensory), BP control of carotid artery at carotid sinus (sensory), parotid gland for secretion
What does CN X innervate? thoraci & abdominal viscera (organs) inc. heart, lungs, stomach, spleen (sens.&motor), palatoglossus m. (motor), epiglottis region of tongue for taste & senssation (spec.sensory), skin around ear (sensory), muscles of soft palate, larynx,& pharynx (motor)
What are the two parts of CN IX and what do they innervate? Spinal part: innervates sternocleidomastoid and trapezius muscles (motor); cranial part: innervates muscle of larynx (motor)
What does the hypoglossal innervate? All intrinsic muscles of the tongue (motor); 3 external muscles of tongue: hyoglossus, genioglossus, and styloglossus
What are the differences b/w parasympathetic and sympathetic divisions? Parasympathetic: Used in everyday life sustaining functions (slows HR, inc. salivary fx), ganglia are close to organs they innervate; sympathetic: responsible for fight or flight response (inc. HR, dec. salivary fxn), ganglia are closer to spinal cord
What are the 2 branches involved in autonomic motor control and their associated ganglia? Greater petrosal branch: Pterygopalatine ganglion Chorda tympani branch: Submandibular ganglion
Created by: ClarkDH
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