Clinical neuroanatomy 24-27
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Created by:
adamruggle on February 5, 2010
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17 terms
Terms | Definitions |
|---|---|
 Amyotrophic lateral sclerosis symptoms | combination of upper and lower motor neuron signs, muscle weakness, atrophy, fibrillation and fasiculations combined with hyperreflexia. |
| Amyotrophic lateral sclerosis lesion involves | both anterior horns (motor) of grey matter (causing a lower motor neuron lesion) as well as the corticospinal tracts (causing an upper motor neuron lesion). |
| Tertiary syphillis symptoms | proprioceptive loss and pain (particularly affecting the lower extremities) |
| Tertiary syphillis lesion | involves the posterior columns of white matter and may extend to the posterior roots and root ganglia |
| Polio lesion | attacks anterior horn cells |
| Polio symptoms | weakness, atrophy, fasiculations, fibrillations, and hyporeflexia |
| Guillain-Barre syndrome nerve involvement | involves peripheral nerves |
| Decorticate posturing follows | typical cerebral hemisphere stroke secondary to carotid artey occlusion |
| Describe decorticate posturing | flexing wrist and elbow and extension (straightening) of the ankle and knee |
| Decerebrate posturing follows | midbrain strokes |
| Describe decerebrate posturing | flexing wrist, extending elbow, ankle, and knee |
| Somatic motor fibers innervate | striated skeletal muscle |
| Somatic sensory fibers innervate | predominately the skin, muscles and tissues other than viscera |
| Visceral components of the autonomic nervous system consists of | visceral sensory and visceral motor components |
| Where do the two different type of nerve fibers synapse | para-long-pre, therefore parasympathetic motor fibers synapse very close or within the end organs, sympathetic motor fibers synapse relatively near the spinal cord |
| A hemisection of the spinal cord at the level of T1 actually produces a contralateral loss of pain-temperature sensation of T3 and below than at T1 and below. Why? | Pain and temperature fibers don't cross over immediately, many ascend 1-2 segments before crossing over |
| Questions 3-3 | ? |
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