chapter 10/11 Flashcards
High fidelity pathways are?
Precise and somatotopically organized
Afferent neurons that transmit a quick stretch of the muscle spindle?
proprioceptors
What are the four types of somatosensations?
Movement, touch, temperature, and pain
Which type of receptor will respond specifically to stretch or deformation?
mechanoreceptors
The Posterior White Column or Dorsal Track enters the dorsal horn and crosses in the __________whereas the Fast Lateral Pain System enters the dorsal root and crosses in the ____________________.
thalamus, medulla
Cell bodies of second-order neurons conveying a signal for conscious proprioceptive information from the upper extremity are located in which of the following?
nucleus gracilis
This unique receptor detects muscle stretch and has both a sensory and a motor component and function?
muscle spindle
Rapidly turning the eyes and head toward a painful stimulus is a function of which tract?
Spinomesencephalic Tract
Axon diameter causes which type of sensory information to travel faster?
touch
Spinothalalmic pain transmission is __________and ________ whereas chronic pain is__________ and _________?
fast pain; slow pain
The area of skin innervated by the axons from cell bodies in a single spinal dorsal root is?
dermatone
If your patient loses somatosensation, in what order will this loss occur? (Hint: largest diameter myelinated axons are affected first) ?
Conscious proprioception and discriminative touch; heat; fast pain; cold; slow pain
The first-order neuron for slow pain is?
adelta fiber
In the Somatosensory Cortex and the sensory homunclus, all areas of the body have equal representation. True or False
false
The Spinocerebellar Tract is this type of Somatosensory Pathway?
Unconscious Relay
