The Somatic Sensory System - Introduction touch
6 important questions on The Somatic Sensory System - Introduction touch
What is the route of primary afferent axons?
How are axons from skin sensory receptors usually designated? And the axons innervating the muscles and tendons in relationship to this?
Which groups are unmyelinated?
Group C (or IV) axons are, by definition, unmyelinated.
The 30 spinal segments (paired dorsal and ventral roots) are divided in four groups:
- thoracic (T) 1 - 12
- lumbar (L) 1 - 5
- sacral (S) 1 - 5
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What is a dermatome, and what is it related to?
When mapped, the dermatomes delineate a set of bands on the body surface.
Information about touch and vibration of the skin takes a path to the brain that is entirely distinct from that taken by information about pain and temperature. What is this pathway called?
The sense of touch of the face obviously does not go via the spinal cord, what route does it follow?
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