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Advanced Pathophysiology Questions anAdvanced Pathophysiology Questions and Correct Answers Latest Update, Graded Ad Correct Answers Latest Update, Graded A

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What is a protective and complex phenomenon composed of sensory experiences (time, space, intensity), emotion, cognition, and motivation? o :## Pain Portion of the nervous system responsible for sensation and perception of pain can be divided into 3 areas: o :## A: Afferent pathways B interp...

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1|Page : 2024 | Grade A+




Advanced Pathophysiology Questions
and Correct Answers Latest Update,
Graded A+

What is a protective and complex phenomenon composed of sensory experiences

(time, space, intensity), emotion, cognition, and motivation?

o :## Pain



Portion of the nervous system responsible for sensation and perception of pain can

be divided into 3 areas:

o :## A: Afferent pathways B interpretive centers in the brainstem, midbrain
& diencephalon C: descending pathways from the brain to the dorsal horn of
spinal cord.



Nociceptors are pain receptors that detect a wide range of stimuli and respond to:

o :## Chemical, mechanical, and thermal stimulation



The afferent system is:

o :## Composed of nociceptors the dorsal horn of the spinal column (second-
order neurons) and afferent neurons in the Aδ and C fibers (first-order
neurons);spinothalamic tract (third-order neurons).



Myelinated Aδ receptor transmission is

o :## Fast and conveys mechanical and thermal localized pain.




Master01: DO NOT COPY AND PASTE!! August 22, 2024 Latest Update

,2|Page : 2024 | Grade A+


Unmyelinated polymodal C fiber transmission is:

o :## Slower and conveys sharp, diffuse burning and aching sensations



These primary-order neurons terminate on second-order neurons.

o :##



Three classes of second-order neurons modulate pain transmission:

o :## projection cells, excitatory interneurons and inhibitory interneurons.



The second-order neurons are located:

o :## in the spinal cord laminae



The second-order neurons function as

o :## a pain gate to regulate pain transmission.



Second-order neurons cross over the cord and ascend primarily in

o :## the lateral the spinothalamic tract to projection centers including the
thalamus reticular formation, and PAG matter.



Third-order neurons carry information to the

o :## sensory cortex and reticular and limbic systems for pain processing and
interpretation.



Efferent pathways from the PAG are responsible for modulation or inhibition of

afferent pain signals.




Master01: DO NOT COPY AND PASTE!! August 22, 2024 Latest Update

, 3|Page : 2024 | Grade A+


o :##



The thalamus cortex, and postcentral gyrus perceive, describe, and localize:

o :## Pain



The reticular formation and limbic system control the

o :## emotional and affective response to pain.



Pain threshold is the point at which pain is perceived. Pain threshold does not vary

significantly among people or within the same person over time.

o :##



Pain tolerance is the duration of time or the intensity of pain that an individual

will ensure before initiating overt pain response.

o :##



Tolerance varies widely among individuals and in the same individual over time

and in the same individual over time.

o :##



Descending inhibitory or facilitatory pathways facilitate pain.

o :##




Master01: DO NOT COPY AND PASTE!! August 22, 2024 Latest Update

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