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19 Cards in this Set
- Front
- Back
What are the functions of the Spinal Cord? |
-conduction -locomotion -reflexes |
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Definition of Conduction |
bundles of fibers passing information up and down spinal cord |
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Locomotion |
-repetitive, central pattern generators are pools of neurons providing control of flexors and extensors (walking) |
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Definition of Reflexes |
involuntary, sterotyped respones to stimuli involves brain, spinal cord and peripheral nerves |
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Gray Matter |
neuron cell bodies with little myelin |
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White Matter |
myelinated axons |
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Contralateral |
origin and destination are on opposite sides |
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Ipsilateral |
origin and destination are on the same side. |
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What carries sensory information up the spinal cord to the brain? |
Ascending Tracts |
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What information does the Posterior Column or Medial Leminiscal Pathway convey? |
Body Movement, limb position, fine touch, pressure. |
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What information does the Spinothalamic Pathway convey? |
pain, heat and cold |
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What carries motor information down the brain stem and spinal cord? |
Descending Tracts |
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What information does the Corticospinal Pathway convey? |
Finely coordinated limb movements |
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What controls reflexive movements of the head in response to visual and auditory stimlui? |
Tectospinal |
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What controls muscles of upper and lower limbs to maintain posture and balance? |
Reticulospinal |
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What receives inputs from inner ear, helps in maintaining balance and posture? |
Vestibulospinal |
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What are the two neuron pathways found in the Corticospinal Tract? |
-Upper motor neuron in cerebral cortex -lower motor neuron in spinal cord |
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What are quick involuntary stereotyped reactions of the glands or muscle to some type of stimulation? |
Reflexes |
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5 Components of a Reflex |
1. Sensory Receptor 2. Sensory Neuron 3. Synapse in spinal cord gray matter 4. Motor Neuron 5. Effector: skeletal muscle |