2nd semester: Ascending fiber tracts

Question 1

True or false: Nociceptor is a type of pain receptor

Answer 1

TRUE

Question 2

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

Answer 2

TRUE

Question 3

Nociceptors consists of

Answer 3

⮞ Free nerve endings

⮞ LARGE field receptors

Question 4

What corpuscles are under THERMORECEPTORS?

Answer 4

Cold = krausse-end bulb 
Heat = ruffini's

Question 5

Tactile receptors detect the ff:

Answer 5

touch, pressure, vibration on skin

Question 6

Merkel’s discs detects

Answer 6

fine touch, extremely sensitive

Question 7

Meissner’s corpuscles detect

Answer 7

fine touch, vibration, large receptor

Question 8

Lamellated/pacinian corpuscle detect

Answer 8

deep pressure , large MULTI-LAYER receptors

Question 9

Proprioceptors are mostly for

Answer 9

position sense

Question 10

what is position sense?

Answer 10

awareness of the position and movement of muscles and joints

Question 11

What receptor monitors skeletal muscle length?

Answer 11

Muscle spindles (modified skeletal muscle cell)

Question 12

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

Answer 12

Golgi tendon organs

Question 13

it monitors pressure, tension and movement of joints

Answer 13

Joint capsule receptors

Question 14

Detects pressure changes?

Answer 14

baroreceptors

Question 15

Chemoreceptors detect change in concentration of chemicals

Answer 15

Muscle spindle, golgi tendon, joint spindle

Question 16

Receptors found in the respiratory centers of the brain?

Answer 16

chemoreceptors

Question 17

Baroreceptors consists of what type of nerves?

Answer 17

Free nerve endings

Question 18

The Spinothalamic tract is located at the

Answer 18

dorsal and ventral to the ventral horn

Question 19

STT relays impulses associated with

Answer 19

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

Question 20

STT constitutes the ____ (part of the brain stem)

Answer 20

spinal lemniscus

Question 21

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

Answer 21

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

Question 22

Is the Lateral STT ipsilateral or contralateral?

Answer 22

Dessusation: contralateral

Question 23

The Lateral STT terminates at the:

Answer 23

ventral posterolateral nucleus of the thalamus

Question 24

Is the Anterior STT ipsilateral or contralateral?

Answer 24

Dessusation: contralateral

Question 25

Thalamic neurons project in what area?

Answer 25

to the post central gyrus, specifically in the somatosensory cortex

Question 26

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

Answer 26

⮞ proprioception | ⮞ discriminative touch from IPSILATERAL area

Question 27

Is the DCMP for conscious proprioception?

Answer 27

YES

Question 28

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

Answer 28

YES

Question 29

What is stereognosis?

Answer 29

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

Question 30

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

Answer 30

Dorsal column-medial lemniscal pathway

Question 31

Receptors under the DCM pathway?

Answer 31

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

Question 32

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

Answer 32

Lower extremities

Question 33

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

Answer 33

Upper extremities

Question 34

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

Answer 34

⮞ Muscle spindle ⮞ golgi tendon organs ⮞ tactile receptors

Question 35

The SCT is associated with?

Answer 35

⮞ control of posture ⮞ movement coordination ⮞ unconscious proprioception

Question 36

The anterior SCT relays info from?

Answer 36

groups of muscles in the LOWER extremity

Question 37

Is the Anterior SCT ipsilateral or contralateral?

Answer 37

contralateral

Question 38

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

Answer 38

Superior cerebellar peduncle (SCP) A-SCT to SCP to cerebellum

Question 39

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

Answer 39

Inferior cerebellar peduncle (ICP)