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7 Cards in this Set
- Front
- Back
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How many sensory neutrons ascending to brain |
3 sensory neurons Spinothalamic |
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How many descending neurons |
2 motor neurons Corticospinal |
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Describe the 3 Ascending steps |
Start at Receptor (stimulus) = 1ST SENSORY NEURON Spinal cord receives message = 2ND SENSORY NEURON Thalamus on opposite side receives message (post office) = 3RD SENSORY NEURON Sensory cortex & integration centre receive it |
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What links the two divisions |
Inter neurons/integration centre link two divisions |
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Describe the 2 Descending steps |
Motor cortex (either side depending on start point) = 1ST MOTOR NEURON Brain stem (most crossover sides here) = 2ND MOTOR NEURON Muscle receives the instruction |
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List full Spinothalamic ascent |
Warm bath ~ left foot ~ nerve receptors ~ sensory NEURON 1 ~ dorsal root ~ spinal cord ~ sensory NEURON 2 ~ crosses the spinal cord ~ brain stem ~ thalamus ~ sensory NEURON 3 ~ right sensory cortex |
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List Corticospinal descent |
Right motor cortex ~ motor NEURON 1 ~ brain stem ~ crosses the brain stem ~ spinal cord ~ motor NEURON 2 ~ left quadriceps muscle ~ foot told how to react!! |
