Download MBBS Physiology Presentations 18 Pain Lecture Notes

Download MBBS (Bachelor of Medicine, Bachelor of Surgery) 1st Year, 2nd Year, 3rd Year and Final year Physiology 18 Pain PPT-Powerpoint Presentations and lecture notes


Pain

Anterolateral system

Free Nerve Endings

? Warm (30-45)
? Cold (10-40)
? noci

? TRP- Transient Receptor Potential

(VR- Vanilloid receptor )

? ASIC (acid sensing ion channel)




VR1/Capsaicin receptor channel


Referred pain

Endogenous

analgesic system

Gate control

Descending

control



Nociceptors
? A. are activated by strong pressure, severe

cold, severe heat, and chemicals.

? B. are absent in visceral organs.
? C. are specialized structures located in the skin

and joints.

? D. are innervated by group II afferents.
? E. are involved in acute but not chronic pain.

Which of the following are correctly paired?
A. Neuropathic pain and withdrawal reflex
B. First pain (fast pain) and dull, intense, diffuse,

and unpleasant feeling

C. Physiological pain and allodynia
D. Second pain (slow pain) and C fibers
E. Nociceptive pain and nerve damage


? Hyperalgesia
? Allodynia
? Neuropathic pain

A 32-year-old female experienced the sudden

onset of a severe cramping pain in the

abdominal region. She also became nauseated.

Visceral pain

A. shows relatively rapid adaptation.

B. is mediated by B fibers in the dorsal roots of

the spinal nerves.

C. is poorly localized.

D. resembles "fast pain" produced by noxious

stimulation of the skin.

E. causes relaxation of nearby skeletal muscles.
A ventrolateral cordotomy is performed that

produces relief of pain in the right leg. It is

effective because it interrupts the

A. left dorsal column.
B. left ventrolateral spinothalamic tract.
C. right ventrolateral spinothalamic tract.
D. right medial lemniscal pathway.
E. a direct projection to the primary

somatosensory cortex.

A 50-year-old woman undergoes a neurological

exam that indicates loss of pain and temperature

sensitivity, vibratory sense, and proprioception in

the left leg. These symptoms could be explained

by

A. a tumor on the right medial lemniscal pathway in

the sacral spinal cord.

B. a peripheral neuropathy.

C. a tumor on the left medial lemniscal pathway in

the sacral spinal cord.

D. a tumor affecting the right posterior paracentral

gyrus.

E. a large tumor in the right lumbar ventrolateral

spinal cord.
A 40-year-old man loses his right hand in a farm accident. Four
years later, he has episodes of severe pain in the missing hand
(phantom limb pain). A detailed PET scan study of his cerebral
cortex might be expected to show
A. expansion of the right hand area in his right primary

somatosensory cortex.

B. expansion of the right-hand area in his left primary

somatosensory cortex.

C. a metabolical y inactive spot where his hand area in his left

primary somatosensory cortex would normal y be.

D. projection of fibers from neighboring sensory areas into the

right-hand area of his right primary somatosensory cortex.

E. projection of fibers from neighboring sensory areas into the

right-hand area of his left primary somatosensory cortex.

This post was last modified on 08 April 2022