Ascending Tracts

Question 1

what are the 4 modalities the tomato sensory system is interested in?

Answer 1

1- discriminative touch (shape, size, texture, movement across skin, ect)

2-proprioception

3-nociception (pain sensation)

4- temperature

Question 2

neural processing?

Answer 2

???

divergence & convergence

lateral inhibition (contrast enhancement)

• feed forward (reciprocal)
• feedback (recurrent)
• distal (pre-synaptic from higher centers)

Question 3

kinaesthetic and position sense receptors:

Answer 3

muscle spindles- primary

skin (SA Ruffini endings)

joint (only limit detectors)

signals of central origins- sense of effort or will

Question 4

what are the 2 separate senses of kinaesthetic and position sense?

Answer 4

share receptors but central processing of info is separate

• position (SA cutaneous receptors; tonic ms spindles)
• movement (FA receptors; phasic ms spindles, GTOs)

Question 5

what is mysterious sense?

Answer 5

basically unaware of it since it has no defined sensation we can identify

Question 6

touch and pressure:

Answer 6

has a definable sense

skin receptors

primary sensory afferents:

• group II fast
• group III and IV slow

separate afferent system traveling in common nerves