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