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20 Somatosensory & Motor Systems > 20 Somatosensory & Motor Systems > Flashcards

20 Somatosensory & Motor Systems Flashcards

1
Q

I, Slide 10: What is another name for the somatotopic map?

A

Homunculus

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2
Q

II, Slide 6: What is the cell membrane of a striated muscle fiber cell called?

A

Sarcolemma

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3
Q

III, Slide 2: Which tract belongs to the lateral pathway?

A. Tectospinal Tract
B. Vestibulospinal Tract
C. Medullary Reticulospinal Tract
D. Rubrospinal Tract

A

D. Rubrospinal Tract

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4
Q

III, Slide 2: What are the 2 pathways of the descending spinal tract? (Pick 2)

A. Lateral Pathway
B. Contralateral Pathway
C. Ventromedial Pathway
D. Ventrolateral Pathway

A

A. Lateral Pathway

C. Ventromedial Pathway

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5
Q

III, Slide 2: True/False - The ventromedial pathway consists of 4 tracts and the lateral pathway consists of only 1 tract.

A

False - lateral pathway consists of 2 tracts

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6
Q

III, Slide 3: True/False - Mammals have both corticospinal and rubrospinal tracts.

A

TRUE

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7
Q

III, Slide 5: True/False – The reticulospinal tract mediates autonomic functions and inhibits voluntary movement.

A

TRUE

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8
Q

I, slide 14: T/F - We have two responses from pain: (1) quick, sharp pain from slow C fibers and (2) dull, sustained pain from fast, myelinated alpha delta axons.

A

False: quick pain from fast, myelinated alpha delta axons & dull pain from slow C fibers

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9
Q

II, slide 10: Alpha motor neurons are influenced by: A. proprioception from muscles spindles B. gamma motor neuron C. golgi tendon organs D. spinal interneurons E. all of the above

A

E. All of the above

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10
Q

III, slide 10: The motor symptoms of Parkinson’s disease result from death of this doapamine-generating component of the basal ganglia. A. substantia nigra B. globus pallidus C. caudate D. putamen

A

A. Substantia Nigra

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11
Q

III, slide 9: T/F - The basal ganglia are important for timing sequence of motor movement.

A

True

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12
Q

III, slide 7 & 8: T/F - Movement in the cortex and superior colliculus is controlled by local coding.

A

False - Population Coding

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13
Q

III, slide 9: The substania nigra is the source of which modulatory neurotransmitter? A. glutamate B. glycine C. acetylcholine D. dopamine

A

D. Dopamine

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14
Q

III, slide 12: Many learned behaviors have been mapped back to which brain structure? A. motor cortex B. thalamus C. cerebellum D. brainstem

A

C. Cerebellum

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15
Q

T/F - Somatotopic mapping does not change according to experience

A

False

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16
Q

T/F - The skin of the spinal cord is called Dermatome, and it function is to supply the spinal nerves…

A

True

17
Q

T/F - Referring to somatotopic mapping, the size is proportional with the density of sensory input..

A

True

18
Q

How many spinal nerves are located in the Thoracic region?

  1. 12
  2. 14
  3. 15
  4. 0
A

12

19
Q

T/F- Primary afferent axons conduct at different speeds

A

True

20
Q

According to receptive field size and adaptation, which options match with Pacinian corpuscle?

  1. Large and Slow
  2. Large and Fast
  3. Small and Slow
  4. Small and Fast
A
  1. Large & Fast
21
Q

How well does this type of mechanoreceptor adapt: Meissners corpuscle?

  1. Slow
  2. Fast
  3. Can’t Adapt
A
  1. Fast
22
Q

T/F - Sensory receptors adapt slowly only.

A

False

23
Q

What is the second inner layer of the skin called?

  1. Epidermis
  2. Dermis
  3. Hypodermis
  4. Connective tissue
A
  1. Dermis
24
Q

T/F - Mechanoreceptors are not sensitive to physical distortion.

A

False

25
Q

Where do signals for the Decending Spinal Tract start?

A

Motor Cortex

26
Q

If the muscle is flexing how is the tension measured?

A

Through the Golgi Tendon Organ

27
Q

What do muscle spindles do?

A

They monitor the length of the muscle and pass on the information to the nervous system.

28
Q

What happens to muscle progenitor cells with age?

A

They stop renewing halting muscle fiber generation and growth.

29
Q

How does Ca2+ cause muscle contraction?

A

It alters troponin on actin so the myosin head can grab on.

30
Q

Muscle contractions are all or nothing or graded?

A

Graded

31
Q

Lower motor circuits go through dorsal or ventral root of the spinal cord?

A

Ventral

32
Q

How do thermoreceptos work?

A

By altering firing frequency ; rapid firing is “on”

33
Q

Where do ascending pain pathways end at?

A

Primary somatosensory cortex

34
Q

Ascending pain pathways go through dorsal or ventral root of the spinal cord?

A

Dorsal

20 Somatosensory & Motor Systems (1 decks)

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