Somatosensory II Flashcards
The ALS system conveysā¦
crude touch, primary pain, and temperature information from the body to the cortex
The trigeminal system conveysā¦
crude touch, primary pain, and temperature information from the face to the cortex
Which are the 3 types of receptors that transmit crude touch, pain, and temperature information?
mechanoreceptors, thermonociceptors, and C-polymodal nociceptors
Which of these receptors responds to various types of noxius stimulu and encodes pain that is poorly localized?
A. mechanoreceptors
B. C- Polymodal Nociceptors
C. Thermonociceptors
B. C-Polymodal Nociceptors
Which receptor type responds to mechanical tissue damage and encode well localized pain?
A. mechanoreceptors
B. C- Polymodal Nociceptors
C. Thermonociceptors
A. Mechanoreceptors
Which of these types of fibers are mylinated?
A. group Ia and Ib
B. group II
C. group III
D. group IV
E. A, B, and C
E
Which of these fibers has the slowest condition velocity and the smallest axon diameter?
A. group Ia and Ib
B. group II
C. group III
D. group IV
D. group IV
Primary hyperalgesia isā¦
A. an exaggerated response to pain in the region of damaged skin
B. an exaggerated response to pain in the skin bordering the damaged tissue
A. an exaggerated response to pain in the region of damaged skin
- B is secondary hyperalgesia
In peripheral sensitization receptors become ____ sensitive and ____ responsive to noxious stimulation after an injury.
A: less, less
B. more, more
C. less, more
D. more, less
B: more, more
Select all that apply: The direct pathway of the ALSā¦
A. conveys group IV fibers
B. conveys group III fibers
C. sends information directly to the cortex
D. is for precise localization
B, C, D.
The direct pathway: conveys group III fibers, sends info directly to the cortex, and is for precise localization
What fibers are in the indirect pathway?
group IV fibers
A patient with a right MCA stroke may experienceā¦
- a loss of crude touch, pain, and temperature information impacting the left upper limb and face
- the left lower limb remains intact
A patient with a left MCA stroke may experienceā¦
- Loss of crude touch, pain, and temperature information impacting the right upper limb and face
- The right lower limb remains intact.
A patient with a right PCA stroke may experienceā¦
Loss of crude touch, pain, & temperature information impacting the entire left side of the body and face.
A patient with a left PCA stroke may experienceā¦
Loss of crude touch, pain and temperature information impacting the entire right side of the body and face
Which areas of the brain are involved in top-down modulation of pain?
A. spinal cord
B. brainstem
C. Thalamus
D. hypothalamus
E. amygdala
F. cortex
G. all of the above
All of the above
What is two point discrimination?
the ability to identify two close points on a small area of skin
What is graphesthesia?
The ability to sense writing on the skin
What is stereognosis?
The ability to sense the form and nature of an object
What is double simultaneous stimulation?
The ability to sense two stimuli when applied at the same time
What is complex regional pain syndrome?
pain being out of proportion to the injury
How would one test the ALS system?
A. two point discrimination
B. pin prick test
C. hot/cold stimuli test
D. both B & C
D. both B & C
What is hyperalgesia?
A. pain due to a stimulus that does not normally provoke pain
B. changes in skin temperature/color
C. increased sensitivity to feeling pain and an extreme response to pain
C. increased sensitivity to feeling pain and an extreme response to pain
What is Allodynia?
A. pain due to a stimulus that does not normally provoke pain
B. changes in skin temperature/color
C. increased sensitivity to feeling pain and an extreme response to pain
A. pain due to a stimulus that does not normally provoke pain
Congenital insensitivity to pain isā¦
a gene mutation that prevents the generation of APās in the primary afferents that convey pain signals
Phantom limb pain is characterized asā¦
Feeling of pain in an absent limb or portion of a limb
