CDO 335 Week Four Notes
CDO 335 Week Four Notes CDO 335
Popular in Anatomy & Physiology of Speech and Hearing
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This 4 page Class Notes was uploaded by Rachel Roede on Friday September 25, 2015. The Class Notes belongs to CDO 335 at Central Michigan University taught by Lori Bissell in Summer 2015. Since its upload, it has received 44 views. For similar materials see Anatomy & Physiology of Speech and Hearing in Communication Disorders & Sciences at Central Michigan University.
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Date Created: 09/25/15
3 Pia Mater 0 Thin membranous covering that closely follows the contours of the brain 0 Major arteries and veins course within this layer 0 The Dura Mater takes on 4 major infoldings o Falx Cerebri Separates cerebral hemispheres o Falx Cerebelli Separates cerebellar hemispheres Cranial Nerves Terminology o Cranial nerves functions are either General or Special 0 Either Somatic voluntary movement or Visceral internal organs 0 Nerves can be Efferent motor information from brain to muscles Afferent sensory information from environment to brain or Mixed Cranial Nerves o l Olfactory Nerve SVA 0 Only a special sensory afferent component 0 Function sense of smell or olfaction o Damage to cranial nerve l Anosmia loss of sense of smell and taste most common 0 ll Optic Nerve SSA 0 Special sensory afferent component only 0 Function conveys visual information from the retina 0 Visual information enters the eye in the form of photons of light which are converted to electrical signals in the retina o Damaged gt can result in vision loss If different parts of this nerve are damaged it can result in different types of vision loss 0 III Oculomation Nerve GSE GVE o Supplies motor component to eye 0 Moves muscles of the eyelid 0 Movement of eye for visual tracking or xation on an object 0 IV Trochlear Nerve GSE 0 Motor component 0 Eye movements speci cally turns eye down and outward 0 V Trigeminal Nerve GSA GVE 0 Both sensory and motor components 0 3 branches I Ophthalmic sensory only 0 Information from skin on upper face forward scalp cornea iris upper eyelid Maxillary sensory information only 0 Lower eyelid skin on sides of nose upperjaw teeth lips mucosal lining of buccal cheeks and nasal cavities maxillary sinuses and nasopharynx I Mandibular both sensory and motor information 0 Sensory information from mandible lower teeth gums and lips EAM ear canal auricle areas of the temporal lobe anterior 23 of tongue and oor of the mouth 0 Motor innervations of the muscles of mastication elevates hyoid tenses palate Vl Abducens Nerve GSE 0 Motor component only 0 Lateral eye movements Vll Facial Nerve SVE SVA GVE 0 Both sensory and motor components 0 Motor innervation to facial muscles 0 Elevates hyoid 0 Sense of taste to anterior 23 of the tongue hard amp soft palates o Salivation Vlll Vestibulocochlear Nerve auditory nerve SSA GVE 0 Motor and sensory components 0 Sense of hearing 0 Sense of balance lX Glossopharyngeal Nerve GSA GVA SVA GVE SVE 0 Both sensory and motor components Pharyngeal movements SaHvann Sensation for swallow re ex Sense of taste posterior 13 of tongue and portion of the soft palate X Vagus Nerve GSA GVA SVA GVE SVE 0 Both motor and sensory components Laryngeal movements Pharyngeal movements Palatal elevation soft palate Sense of taste 3 branches Pharyngeal branch innervates soft palate 0 Damage results in hypernasality Superior laryngeal branch moves the cricothyroid muscle 0000 00000 0 Damage results in no control of pitch of voice you will sound monotone Recurrent laryngeal branch muscles of abduction open and adduction closed 0 Damage results overall voice quality Hoarse raspy breathy 0 Xl Accessory Nerve SVE 0 Motor component Helps out other nervesbody parts Head turn shoulder shrug Helps elevate the palate Helps laryngeal movements lnnervates pharyngeal muscles 0 Works in conjunction with the Vagus nerve Xll Hypoglossal Nerve GSE 0 Motor component 0 Movements of the tongue 0 Elevates hyoid OOOOO Cerebrovascular System 0 Circle of Willis 0 Series of communicating arteries AKA anastomoses in brain 0 All major cerebral vessels arise from this 0 2 major pairs of arteries supply blood to brain Vertebral Arteries lnternal Carotid Arteries o Vertebral Arteries give rise to Posterior Cerebral Artery I Basilar Artery 0 Internal Carotid Artery gives rise to Posterior Communicating Artery Anterior Cerebral Artery Middle Cerebral Artery Anterior Communicating Artery 0 Purpose provide redundant pathways for blood ow to regions of the cerebral cortex equalizing pressure and ow of blood 0 Anterior Cerebral Arteries ACA connected by the Anterior Communicating Cerebral Artery Serve the anterior medial surfaces of the brain from frontal to anterior parietal lobes includes medial sensorimotor cortex Corpus Collasum Basal Ganglia Anterior limb of Internal Carotid Artery Arises from lnternal Carotid Artery 0 Middle Cerebral Arteries MCA Courses laterally along inferior surface of brain Through Sylvian ssureLateral ssure Provides blood to temporal lobe motor strip Broca s area Wernicke s area sensory reception regions 3 lobes Also arises from Internal Carotid o Posterior Cerebral Arteries PCA connected by the Parietal Communicating Cerebral Artery Serves the inferior temporal and occipital lobes medial occipital lobe and primary visual cortex upper midbrain Arises from Vertebral Artery Clinical Note 0 Middle Cerebral Artery is most common site of occlusion o If damage is on left communication problems
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