Sensorimotor Integration Flashcards

1
Q

Explain the monosynaptic stretch reflexes
1. ____ of the mechanoreceptors in the muscle ____ firing rate of the ____ sensory neuron.
2. Increased ____ release activates the ____ neuron.
3. ____ of biceps muscle

A
  1. Stretch, increase, afferent
  2. neurotransmitter, motor
  3. Contraction
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2
Q

What is the reaction time due to the reflex versus voluntary movement of the contralateral leg?

A

Contraction time:
reflex leg: 25 msec
‘voluntary’ leg: 170 msec

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3
Q

Meaningful behaviour requires sensorimotor integration. Selecting an appropriate behaviour depends on what 5 things?

A
  1. Context
  2. Internal state
  3. Stage in life
  4. Prior experience (memory)
  5. Current sensory information
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4
Q

CNS neurons can affect the sensory-motor relationship of ________ reflexes.

A

Polysynaptic

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5
Q

Fill in the gaps describing how the visual system detect an object…
1. Cones in the ____ detect light ____ off the object
2. 2. ____ transduce the light stimulation into ____ activity
3. ____ cells change the activation state of ____ cells, which convey ____ information to the brain

A

1.fovea, bouncing
2.Photoreceptors, neural
3.Bipolar, ganglion, visual

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6
Q

Fill in the gaps about visual attention and saccades:
1. The content of a subject’s visual ______ can be traced from the course of that person’s ______.
2. Neurons in the ______ parietal cortex fire more vigorously when the visual stimulus are the ______ of saccades.
3. ______ on the posterior parietal region cause ________ deficits in humans (e.g., spatial neglect).

A
  1. attention, saccades
  2. posterior, target
  3. Lesions, attentional
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7
Q

The saccade system keeps an ____ in the ____, where vision is most ____

A

image, fovea, accurate

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8
Q

Superior colliculus performs visuomotor integration. This region forms a map of ____ ____ ____. Each neuron within the map ____ before the eyes ____ to the ____ location in that map.

A

potential eye movement.
fires
move
corresponding

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9
Q
  1. Movement-related neurons fire ____ saccades to specific ____
  2. Visual-fixation neurons fire ____ the saccade, inhibiting ____ away from the target
A
  1. before, locations
  2. after, movements
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10
Q

Fill in the gaps about eye saccades (babes don’t worry if you don’t know this one)
The ______ nucleus inhibit the _____ inhibition of the substantia nigra pars reticulata (disinhibition), which allows the ______ colliculus neurons to fire and produce a ______.

A

caudate, tonic, superior, saccade

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11
Q

The two things the geniculostriate pathway perceives…
1. Perception of ____ and ____ by the ____ visual stream (how)
2. Perception of ____, ____ and ____ by the ____ visual pathway (what)

A

1.motion, depth, dorsal
2. contrasts, contour, colour, ventral

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12
Q

The tectopulvinar pathway perceives perception of the court (tennis example) by the ____ pathway (where)

A

pulvinar

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13
Q

Using the example of a tennis ball, the three things the trajectory prediction discusses are…
1. The ____ information about where the ball is ____ to bounce is from ____ (memory)
2. ____ integration produces a ____ of where the ball will bounce
3. Using both the ____ and the ____ the brain ____ the bounce and produces ____

A
  1. prior, likely, experience
  2. Sensorial, likelihood
    3.prior, likelihood, estimates, behaviour.
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14
Q

What does the oculomotor loop control?
Eye m____ and t____

A

Eye movement and tracking

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15
Q

The skeletomotor loop controls ____ movements

A

Voluntary

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16
Q

What three things is the basal ganglia involved in?
1. A_____ S______
2. I_____ and T_____ A_____
3. R______ A______ with C______

A
  1. Action selection
  2. Initiation and terminating actions
  3. Relating actions with consequences
17
Q

Brain scans have shown some regions of the cerebellum are activated when eye tracking and hand movement require coordination. This shows the cerebellum is involved in what?

A

Movement precision and outcome

18
Q

What does the “motor homunculus” map?

A

The areas of the motor cortex responsible for moving each part of the body

19
Q

Acetylcholine release by the motor neuron axon terminal will contract what?

A

Fibres in the target muscle