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Motor Control > Topic 3 > Flashcards

Topic 3 Flashcards

1
Q

Somatotopy

A

Correspondence of an area of the body to a specific point on the CNS

In spinal cord and motor cortex

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2
Q

Convergence

A

Output from large cortical territories onto individual muscles

Large to small

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3
Q

Divergence

A

Output from the single M1 neurons to multiple muscles

Small to large

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4
Q

Corticospinal Tract

Lateral and Ventral

1) Originate
2)Terminate
3)Decussation Level
4)Function//Role

A

Lateral
1) Originate - Primary Motor Cortex
2)Terminate - Spinal Motor Nuclei on contralateral side
3)Decussation Level - Medulla
4)Function//Role - Limb Movement

Ventral
1) Originate - Same as above
2)Terminate - Spinal Motor Nuclei on ipsilateral side
3)Decussation Level - Terminal Level
4)Function//Role - Trunk/Axial Movement

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5
Q

Vestibulospinal Tract

Lateral and Medial

1) Originate
2)Terminate
3)Decussation Level
4)Function//Role

A

Medial

1) Originate - Vestibular Nuclei
2)Terminate - Bilateral input to LMN for neck msucles
3)Decussation Level - Where is synapses
4)Function//Role - Stabalizes head, Cordinate Head, eye movements

Lateral

1) Originate - Vestibular Nuclei
2)Terminate - Flexor and Extensor Muscles
3)Decussation Level - No cross over so no level
4)Function//Role - Mediate postural adjustments; coordinate orientation of head and body in space

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6
Q

Lower Motor Neurons are

A

The final common pathway for motor action

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7
Q

What structures are involved in voluntary movement; Execute the movement

A

Primary motor control, brainstem, spinal cord

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8
Q

What is the role of execute the movement

A

Execute contractions of muscles

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9
Q

What structures are involved in voluntary movement; Evaluate the results

A

Primary visual cortex, parietal cortex, cerebellum, and more

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10
Q

What structures are involved in voluntary movement; What is the role of Evaluate the results?

A

How did it go
Was the goal reached
update for next attempt and inl ong term memory for later use

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11
Q

What is the function role in the movement for the premotor cortex?

A

Planning movements: selection of most appropirate based on the context (sensory ques)

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12
Q

What is the function role in the movement for the supplementary motor area?

A

Planning movements, anticipation, postural and stabalization

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13
Q

What is the function role in the movement for the Primary motor cortex?

A

Stimulation = localized muscle contractions on the contralateral side of body

Direct projection from cortect to spinal cord via corticospinal tract

controls executive of movement

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14
Q

What is the function role in the movement for the Primary somatosensory cortex?

A

Tactical representation
stimulation: contralateral tingling or numbness but NOT pain

  • Lesions cause contraleteral loss of tactile discrimmation and position sense but no relief of pain
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15
Q

What is the function role in the movement for the Posterior parietal cortex

A

Recieves somatosensory, propriceptive and visual imput to determine positions of the body and target in space

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16
Q

What is the function role in the movement for the Basal Glanglia

KNOW NOT A CORTICAL STRCUTRES

A

Not part of the CORTICAL STRUCTURE KNOWWWW

Facilitates movements by channeling info from various region regions of the cortext to the SMA

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17
Q

What is the function role in the movement for the CEREBELLUM

A

NOT CORTICAL STRUCTURE

Stored learned sequences of movements

participated in fine tuning and cordination of movements produced elsewhere the brain

18
Q

What structures are involved in Voluntary Movement: select appropriate response

A

Prefrontal cortex, parietal cortex, and basal ganglia

19
Q

What is the role of Voluntary Movement: select appropriate response

A
  • Defines motor strategies
  • Objectives of the movements –> behaviors to achieve the objectives.
  • This is what we want to do
20
Q

What is the role of Voluntary Movement: Plan movement in physical terms

A

Premotor, supplementary motor, and cerebellum

21
Q

KAHOOT AND ON
What occurs immediatylt prior to an AP in a mechanoreceoptor?

A

Receptor potential

22
Q

What kind of adaptation would be neccesary in a receptor to sense vibration?

A

Fast adaptation

23
Q

What area of your body is capable of the most precise tactile feedback?

A

Finger tips

24
Q

Which of the following does not provide sensory information related to muscle contraction?

A

gamma motor nuerons

25
Q

The reflex pcitured here is the monosynpatic reflex (Flexor withdrawel reflex)

A

false

26
Q

Vibrating the biceps tendon on a straight arm will elicit what kinesthesic illusion?

A

Hyperextended posture

27
Q

What muscle would you have to vibrate for a flex posture of the arm?

A

biceps (in the back)

28
Q

KAHOOT FOR SECOND TOPIC START

The area where intentions produce output to the spinal cord that yields the motor outcomes is

A

Red on brain

Primary motor cortex

contains upper motor nuerons

29
Q

The area that oraganized sequeneces of movements is

A

blue are of brain

Pre motor cortex

30
Q

The area that recieves touch input from the entire body

A

yellow area of brain

31
Q

Definign a precise sewuence of muscle actions ocures in the ….

A

set steps of muscle actions

32
Q

Input from one upper motor neuron onto many alpha motor neuron is an example of

A

divergence

33
Q

Convergence

A

many upper motor nuerons to one alpha motor nuerons

34
Q

What is gray matter?

A

Neural cell bodies

35
Q

What is white matter

A

Bundles of myelinated axons

36
Q

What is a bundle of axons in cns

A

Tract

37
Q

What is a bundle of axons in the pns

A

Nerve

38
Q

What is a collection of nerve cell bodies called in cns

A

nucleus

39
Q

What is a collection of nerve cell bodies called in pns

A

ganglion

40
Q

Motor neuron cell bodies are located in the …….

A

Ventral horn

41
Q

Know some of the lobes on reference sheet

A

Motor Control (13 decks)

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