Topic 14 Cranial Nerves and ANS COMPLETE handout

Topic 14 Cranial - Cranial Nerves and the Autonomic Nervous System Topic 14 Lecture outline Lecture outline Structure and function of cranial

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Cranial Nerves and the Autonomic Nervous System Topic 14 Lecture outline Lecture outline Structure and function of cranial nerves Anatomy of the autonomic nervous system Functions of the autonomic nervous system Comparisons of somatic and autonomic nervous systems
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The Cranial Nerves 12 pairs of nerves Arise from brain & exit through foramina leading to muscles, glands & Input & output remains ipsilateral except CN II & IV
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I cranial - Olfactory Nerve Olfactory mucosa of nasal cavity (20) Olfactory foramina/bulbs/ tracts Damage results in anosmia SMELL – SENSORY
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II cranial- Optic Nerve Retina of eye Optic nerves exits through optic foramen forms optic chiasm with hemidecussation /optic tract Projects to occipital lobe Damage causes blindness in visual field VISION SENSORY
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III cranial - Oculomotor Nerve Motor : superior rectus, inferior rectus, medial rectus, inferior oblique, levator palpebrae PS: sphincter muscle of iris, ciliary muscle Sensory: proprioception Eye movement, opening of eyelid, constriction of pupil, focusing lens Drooping eyelid, dilated pupil, double vision, difficulty focusing & inability to move eye up, down, inward PS EYE MOVER MOTOR midbrain
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IV cranial -Trochlear Nerve Motor: superior oblique muscle Sensory: proprioception Function: movement of the eye inferolaterally smallest PULLEY- MOTOR Midbrain
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V cranial - Trigeminal Nerve Pons largest THREE BRANCHES MIXED Ophtalmic division V1- sensory Maxillary division V2- sensory Mandibular division V3- motor
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Trigeminal neuralgia inflammation of trigeminal nerve recurring episodes of intense stabbing pain in trigeminal nerve area (near mouth or nose) considered most excruciating pain known pain triggered by touch, drinking, washing face, brushing teeth analgesics are only partially effective treatment is cutting of nerve, but results in loss of sensation
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VI cranial - Abducens Nerve Lateral rectus muscle, provides eye movement laterally Damage results in inability to rotate eye laterally & at rest eye rotates medially ABDUCTION MOTOR pons
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VII cranial -Facial Nerve Sensory: anterior 2/3’s of tongue and proprioception from muscles of facial expression Thalamus PS FACIAL EXPRESSION MIXED
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Branches of Facial Nerve Motor: 5 branches Pons PS fibers to lacrimal glands, submandibular and sublingual salivary glands Damage produces sagging facial muscles
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WHAT IS BELL'S PALSY? Bells palsy is a condition that causes the facial muscles to weaken or become
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This note was uploaded on 06/05/2011 for the course KINS 2531 taught by Professor Sturges during the Spring '11 term at Georgia Southern University .

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Topic 14 Cranial - Cranial Nerves and the Autonomic Nervous System Topic 14 Lecture outline Lecture outline Structure and function of cranial

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