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HTHSCI 1D06 > Lecture 10: Motor Tracts > Flashcards

Lecture 10: Motor Tracts Flashcards

1
Q

Which structures are responsible for linear acceleration?

A

Utricle/saccule

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2
Q

Which structures are responsible for rotational acceleration?

A

Semi-circular canals

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3
Q

What is the spinothalamic tract responsible for?

A

Carrying information about pain

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4
Q

What are the two exogenous pain control options? What do they do?

A

NSAIDS act peripherally to lock neurons from perceiving pain at site of injury. Opiates act peripherally to limit pain frequency/intensity, and within the CNS to prevent neurotransmission

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5
Q

What is spinal cord gate control?

A

Endogenous inhibition of pain by touch/proprioception

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6
Q

What is reticular formation activation?

A

Endogenous form of pain control that inhibits pain signals from release of endorphins & enkaphalins

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7
Q

What are the three portions of the motor system? What do they do?

A

Corticospinal tract (spends info from brain to body)
Basal ganglia (specific, complex motor sequences)
Cerebellum (modulates motor plans based on sensory inputs)

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8
Q

What is different between a TIA and bell’s palsy?

A

TIA: one-sided muscle weakness
Bell’s: One-sided muscle paralysis, symptoms localized to face

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9
Q

What are the two neuron systems? What are their responsibilities?

A

Pyramidal: initiate voluntary movement.
Extrapyramidal: modulate Lower Motor Neuron Activity, involuntary, maintain reflexes, muscle tone, etc.

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10
Q

What is the origin of motor tracts? What are the names of tracts?

A

Origin: precentral gyrus
Tracts: corticospinal, corticobulbar

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11
Q

Corticospinal tracts take up ___% of upper motor neurons. They are divided into _______ and ________/__________. It has ____________ innervation to body.

A

85, lateral, anterior/ventral, contralateral (switches sides)

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12
Q

What is the synapse location of the corticobulbar tracts?

A

Ventral/anterior horn of spinal cord

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13
Q

Corticalbulbar tracts have _______ inervation to the head/______. Its synapse location is the _________ _________ of _____ nerves.

A

Bilteral, neck, motor nuclei, cranial

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14
Q

Corticospinal and corticobulbar tracts are responsible for _______ movement.

A

Voluntary

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15
Q

Lower motor neurons start in _________, go to _____, and convey ___________.

A

Brainstem, muscle, information

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16
Q

Name the three structures within the basal ganglia.

A

caudate nucleus, putamin & globus pallidus

17
Q

What is included within the striatum?

A

Caudate and putamen

18
Q

What is included within the lentiform nucleus?

A

Putamen & globus pallidus

19
Q

What are the related midbrain nuclei to the basal ganglia?

A

Susbtania nigra, subthalamic nucleus

20
Q

What causes Huntington’s?

A

Degeneration in striatum = increased movements

21
Q

What causes Parkinson’s?

A

Lack of dopamine, difficulties start-stopping movements

22
Q

Basal ganglia is helpful for what, in comparison to the cerebellum?

A

Basal ganglia is responsible for low-risk, simple movement. Cerebellum is responsible for higher level movement.

23
Q

What is the corticopontine tract?

A

Tract from cortex to pons. Responsible for appendicular control, critical for fine control of hands and limbs.

24
Q

What is the spinocerebellar tract?

A

Tract from spinal cord to cortex. Responsible for axial control, takes in proprioception info from joints and muscles, then sent to cerebellum.

25
Q

Both ______ ______ and ________ ______ go through the thalamus.

A

Basal ganglia, cerebellar pathways

26
Q

The ________ ______ acts as an integrating center for some _________.

A

Spinal cord, reflexes

27
Q

Reflexes can be ________, _________, ________, ________.

A

Somatic, autonomic, monosynaptic, polysynaptic

28
Q

Sensory (_________) and motor (_______) information interface and integrate at the ________ ________.

A

Afferent, efferent, spinal cord

29
Q

Reflexes are fast, __________, unplanned sequences of events in response to a ___________.

A

Involuntary, stimulus

HTHSCI 1D06 (25 decks)

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