NURS140 Lecture Notes - Lecture 6: The Motor, Trochlear Nerve, Muscle Tone
30 Nov 2016
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Unit 6: sensory & motor tracts of the spinal cord. Function of tracts: highway for sensory and motor information, sensory tract ascend, motor tracts descend, naming a tract often involves it"s origin and destination (i. e. spinocerebellar tract origin is spinal cord, destination is cerebellum) Carry sensory information from the peripheral body to the brain: descending pathways. Transmit motor information from brain or brainstem muscles or gland. Pathways crosses over from one side to the body to the other side at some point in it"s travels. All pathways are composed of paired tracts. A pathway on the left side of the cns has a matching tract on the right side of the cns. Pathways are composed of a series of two or three neurons that work together. The anterior spinothalamic tract carries crude touch and pressure sensations to the primary sensory cortex on the opposite side of the body. The crossover occurs in the spinal cord at the level of entry.
