Chapter 5 part 3: somatosensory system / touch

Question 1

examples of mechanical sensory from the skin

Answer 1

light touch, deep pressure, hot and cold temperature, chemical or mechanical injury

Question 2

mechanoreceptors

Answer 2

found at end of sensory neurons, react to light and deep pressure

Question 3

the mechanoreceptors are connected to the ______ via the nerve.

Answer 3

pacinian corpuscle

Question 4

true or false: pain is harder to localize than touch

Answer 4

true: this is due to the many varities and pain inducing senses.

Question 5

emotional component of pain

Answer 5

feelings of anxiety, uncertainty.

- S1 and limic system affected.

Question 6

what controls pain?

Answer 6

the consciousness // explains why we can forget pain or shut it out with distractions or the placebo effect.

Question 7

phantom pain

Answer 7

missing limb feels distorted

happens to 50 -80% of amputees

Question 8

ramachandran’s mirror box

Answer 8

causes phantom pain to go away.

Question 9

proprioception and vestibular sense

Answer 9

helps keep track of where we are

maintains balance

Question 10

what do Proprioceptors sense?

Answer 10

muscle stretch and force (muscles feel stretch and tendons feel force)
- this explains why we know what our bodies are doing without looking.

Question 11

pathway for proprioceptors

Answer 11

sensory neurons -> spinal cord -> brainstem -> thalamus -> M1 and S1

Question 12

vestibular sense

Answer 12

refers to ears part of sensing balance

• semicircular canals and fluid inside them
• response to acceleration and deceleration