Physiology Lesson 3

Question 1

What are the 3 main levels of neural integration in the somatosensory system?

Answer 1

1) Receptor level
2) Circut level
3)perpetual

Question 2

Spinothalamic pathwyays go from where to where and what are they primarily responsible for?

Answer 2

input from many types of sensory receptors. Fibers cross in spinal cord. Transmit impulses for pain pressure, touch, temperature.

Question 3

Doral-column medial lemniscal pathway

Answer 3

Precise transmission of from ONE single type of sensory receptor. Medula to thalamus

Question 4

Something notable about spinocerebral pathway

Answer 4

Does not contribute to conscious sensation

Question 5

What is different about dorsal-column medial lemniscal pathway, spinothalamic and spinocerebral.

Answer 5

spinocerebral: termints in cerebellum
the other 2 termintate in sensory cortex

Question 6

Give 2 examples of axon of first order sensory neurons

Answer 6

1) fasciculus cuneatus
2)fasciculus gracilis

Question 7

Lateral spinothalamic pathway does what?

Answer 7

Transmits impulses concerned with pain and temperature to opposite side of brain for interpretation by somatosensory cortex.

Question 8

Ventral spinothalamic pathways does what?

Answer 8

Transmits impulses concerned with crude touch and pressure to opposite side of brain for interpretation by somatosensory cortex.

Question 9

differnce between faciclus gracillas and cuneatus

Answer 9

Cuneatus transmits afferent impulses from upper body Gracilis carries impulses from lower body.

Question 10

What is perpetual detection

Answer 10

Ability to detect that a stimulus has occurred

Question 11

What isi magnitude detection

Answer 11

ability to detect how intense the stimulus is.

Question 12

What are visceral pain stimuli

Answer 12

Ischemia (low blood flow)
muscle stretch/spasm
irritating chemicals