Ch 10 Flashcards
Somatosensory pathways= 3 neuron pathways. What are they?
Sensory receptors->spinal cord
Spinal cord->brainstem
Brainstem -> thalamus
Thalamus->cerebral cortex
Sensory info from musculoskeletal sys is called
Proprioception and nociception
T/F: proprioception provides info about stretch of musc, tension in tendons and deep vibrations
T
Where are sensory neurons located?
Distal ends of peripheral neurons
What are the somatosensory receptors
Mechanoreceptors
Chemoreceptors
Thermoreceptors
T/F: mechanoreceptors respond to substances released by cells
F: Chemoreceptors
(mech respond to mechanical deformation of receptor by touch, pressure, stretch or vibration
What somatosensory receptor responds to heating/cooling?
Thermoreceptors
What do nociceptors interpret
Pain
Tonic receptors ___ the entire time stim= present
Phasic receptors ___while stim= present
Responds
Stop responding
Somatosensory 1st order are located ___ and are ___ and have 2 axons
Outside the spinal cord in dorsal root ganglia
Pseudounipolar
What is a receptive field?
Area of skin innervated by single afferent neuron
Larger proximally and smaller distally
T/F: nociception includes vibrations, skin stretch and skin pressure
F: Subsensations (light touch)
Free nerve endings respond to __ touch
Coarse (nociception and temp)
Touch info= ___ and ___
Light touch
Coarse touch (tickle, itch)
Nociceptros respond to stim that
Damage/threaten tissue
T/F: thermal receptors respond to warmth/cold w/in temp that damages tissue
F: temp that doesn’t damage tissues
Dermatomes= used to diagnose radiculopathy. What is radiculopathy?
Lesion affecting a single nerve root
If a lesion involves peripheral n, sensory impairment =___
In the distribution of peripheral n