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PHYSIOLOGY > 2nd semester: Ascending fiber tracts > Flashcards

2nd semester: Ascending fiber tracts Flashcards

Receptors used in pathways Termination Decussation Synapse

1
Q

True or false: Nociceptor is a type of pain receptor

A

TRUE

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2
Q

T OR F: Nociceptors are rare in the deep tissue and visceral organs.

A

TRUE

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3
Q

Nociceptors consists of

A

⮞ Free nerve endings

⮞ LARGE field receptors

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4
Q

What corpuscles are under THERMORECEPTORS?

A 
Cold = krausse-end bulb 
Heat = ruffini's
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5
Q

Tactile receptors detect the ff:

A

touch, pressure, vibration on skin

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6
Q

Merkel’s discs detects

A

fine touch, extremely sensitive

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7
Q

Meissner’s corpuscles detect

A

fine touch, vibration, large receptor

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8
Q

Lamellated/pacinian corpuscle detect

A

deep pressure , large MULTI-LAYER receptors

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9
Q

Proprioceptors are mostly for

A

position sense

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10
Q

what is position sense?

A

awareness of the position and movement of muscles and joints

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11
Q

What receptor monitors skeletal muscle length?

A

Muscle spindles (modified skeletal muscle cell)

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12
Q

Dendrites around collagen fibers at the muscle-tendon junction? They also monitor skeletal muscle TENSION?

A

Golgi tendon organs

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13
Q

it monitors pressure, tension and movement of joints

A

Joint capsule receptors

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14
Q

Detects pressure changes?

A

baroreceptors

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15
Q

Chemoreceptors detect change in concentration of chemicals

A

Muscle spindle, golgi tendon, joint spindle

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16
Q

Receptors found in the respiratory centers of the brain?

A

chemoreceptors

17
Q

Baroreceptors consists of what type of nerves?

A

Free nerve endings

18
Q

The Spinothalamic tract is located at the

A

dorsal and ventral to the ventral horn

19
Q

STT relays impulses associated with

A

⮞ pain
⮞ thermal sensation
⮞ pressure
⮞ non-discriminative touch (cotton touch)

20
Q

STT constitutes the ____ (part of the brain stem)

A

spinal lemniscus

21
Q

what receptors does the Lateral Spinothalamic tract (LST) contain?

A

⮞ free nerve endings
⮞ krausse end bulbs
⮞ ruffini’s corpuscle

22
Q

Is the Lateral STT ipsilateral or contralateral?

A

Dessusation: contralateral

23
Q

The Lateral STT terminates at the:

A

ventral posterolateral nucleus of the thalamus

24
Q

Is the Anterior STT ipsilateral or contralateral?

A

Dessusation: contralateral

25
Q

Thalamic neurons project in what area?

A

to the post central gyrus, specifically in the somatosensory cortex

26
Q

What impulses does the Dorsal Column-Medial pathway carry? DCML

A

⮞ proprioception

⮞ discriminative touch from IPSILATERAL area

27
Q

Is the DCMP for conscious proprioception?

A

YES

28
Q

Is DCM pathway associated with the two-point discrimination test?

A

YES

29
Q

What is stereognosis?

A

The ability to recognize an object by touch even with eyes closed

30
Q

Vibratory sense and Rhomber’s sign is under what pathway/tract?

A

Dorsal column-medial lemniscal pathway

31
Q

Receptors under the DCM pathway?

A

⮞ Pacinian corp,
⮞ meissner’s corp,
⮞ muscle spindle

32
Q

Fasiculus gracilis located in the medial area, receives impulses from?

A

Lower extremities

33
Q

Fasiculus cuneatus located in the lateral area, receives impulses from?

A

Upper extremities

34
Q

The Spinocerebellar tract (SCT) carry impulse from what receptors to the cerebellum?

A

⮞ Muscle spindle
⮞ golgi tendon organs
⮞ tactile receptors

35
Q

The SCT is associated with?

A

⮞ control of posture
⮞ movement coordination
⮞ unconscious proprioception

36
Q

The anterior SCT relays info from?

A

groups of muscles in the LOWER extremity

37
Q

Is the Anterior SCT ipsilateral or contralateral?

A

contralateral

38
Q

The anterior SCT passes through the ___ before it enters the cerebellum

A

Superior cerebellar peduncle (SCP)

A-SCT to SCP to cerebellum

39
Q

The Posterior SCT and Cuneocerebellar tract pass through the ___ before entering the cerebellar cortex

A

Inferior cerebellar peduncle (ICP)

PHYSIOLOGY (27 decks)

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