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Chap 11 Sp Cord/PNS
Chap 11 The Human Body in Health and Illness 3rd Edition -Evolve
| Question | Answer |
|---|---|
| A continuation of the Brain Stem; Tubelike structure | Spinal Cord |
| A hollow needle is inserted into the subarachnoid space, Between L3 & L4 | Lumbar Puncture |
| Composed primarily of cell bodies and interneurons | Grey Matter |
| An opening, or hole, that extends the entire length of the spinal cord | Central Canal |
| Composed primarily of the myelinted axons | White Matter |
| Neuronal axons that are grouped together | Nerve Tract |
| Carry information from the periphery, up the spinal cord, and toward the brain are called | Sensory Tract/Ascending Tracts |
| It carries sensory information for touch, pressure, and pain from the spinal cord to the thalamus in the brain(controls-temp, pressure, pain, light motor) | Spinothalamic Tract |
| Carries information from the brain, down the spinal cord and toward the periphery | Motor Tracts/Descending |
| Major motor tract; motor information is carried from the cortical region(frontal lobe)of the brain toward the spinal cord(controls-skeletal muscle tone,voluntary muscle movement) | Pyramidal Tract/Corticospinal |
| Functions are Proprioception; deep pressure; vibration | Dorsal Column |
| Most nerve tracts cross over from one side to the other this is called | Decussation |
| Fuctions-Propriception | Spinocerebeller |
| Skeletal muscle activity; Balance and Posture | Extra Pyramidal |
| If the spinal cord is severed at the neck region, the trunk and all four extremities are paralyzed. This condition is called | Quadriplegia |
| Lower spinal cord injury, involving only the lumbar region of the spinal cord , the person has funn use of the upper extremities but is paralyzed from the waist down | Paraplegia |
| Attached to the spinal cord, formed by dorsal and ventral roots | Spinal Nerves |
| Sensory nerve fibers from the periphery travel to the cord through the | Dorsal Root |
| The cell bodies of the sensory nerve fibers are gathered together in the | Dorsal Root Ganglia |
| Composed of motor fibers; Distributed to the muscles and glands | Ventral Root |
| The spinal cord serves three major functions | Sensory Pathway, Motor Pathway and Reflex Center |
| An involuntary response to a stimulas is a | Reflex |
| A nerve pathway involved in a reflex | Reflex Arc |
| Sense of smell | Olfactory I |
| Sense of Sight | Optic II |
| Movement of the eyeball, Rasing eyelid, Change in pupil size | Oculomotor III |
| Chewing food, sense in face, scalp, cornea, and teeth | Trigminal V |
| Movement of the eyeball | Abducens VI |
| Facial expressions, secreation of saliva and tears, taste, blinking, sense of hearing and balance | Facial VII |
| Sense of hearing and balance | Vestibulocochlear VIII |
| Swallowing, secreation of saliva, taste, sensory for the reflex requlation of BP, part of the gag reflex | Glossopharyngeal IX |
| Visceral muscle movement and sensations, especially movement and secreation of the digestive system, sensory for reflex regulation of BP | Vagus X |
| Movement of eyeball | Trochlear IV |
| Swallowing, Head and sholder movement, Speaking | Accessory XII |
| Speech and Swallowing | Hypoglossal XII |
| Nerve fibers converging or coming together | Plexuses |
| Supplies the muscles and skin of the neck | Cervical Plexus (C1-C4) |
| Stimulates the contration of the diaphram | Pherenic Nerve |
| Supply the muscles and skin if the shoulder, arm, forearm, wrist and hand | Brachial Plexus (C5-C8, T1) |
| Gives rise to nerves that supply the muscles and skin if the lower abdominal wall external genitalia, buttocks, and lower extremities | Lumbosacral Plexus (T12, L1-L5,S1-S4) |
| A spinal nerve that innervates a paticular area of the skin; this distrubution of nerves is called | Dermatome |
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dhollan127
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