Criado por Ben Williams
mais de 7 anos atrás
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Questão | Responda |
Where are the nerve cell bodies located in the spinal cord? | Central gray matter |
What is located in the ventral horn? | Motor nuclei that send axons out via ventral nerve root filaments; Primarily Laminae IX, which is motor nuclei for skeletal muscles. |
Which artery supplies the anterior 2/3 of the spinal cord? | Anterior spinal artery |
Which artery supplies the posterior 1/3? | Posterior spinal artery |
Why is there more gray matter at the cervical and lumbar levels of the SC? | Because of motor nuclei for the arms and legs |
Why is there more white matter in the cervical region of the SC? | Because at cervical levels, most ascending fibers have entered the cord on their way up to the cortex and most descending fibers have not yet reached their target motor nuclei. |
What part of the body do the lateral motor systems control? Where are the cell bodies for these neurons located (specifically) in the SC? | Distal limb movements, favoring flexors. The cell bodies are located in lateral portion of spinal cord to synapse on lateral motor nuclei. |
What part of the body do the medial motor systems control? Where are the cell bodies for these neurons located (specifically) in the SC? | Medial control posture (extensors) and proximal movements. The cell bodies are located in medial portion of spinal cord to synapse on medial motor nuclei and travel in anterior medial portion. |
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