8. Somatic Motor Functions Flashcards

1
Q

Responsible for maintaining the body’s posture and balance

A

Somatic motor system

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2
Q

Occur without conscious thought

A

Involuntary movements

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3
Q

Consciously activated to achieve a specific goal such as walking or typing

A

Voluntary movements

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4
Q

Have cell bodies in the cerebral cortex

Form descending tracts that connect to lower motor neurons

A

Upper motor neurons

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5
Q

Have cell bodies in the anterior horn of the spinal cord

A

Lower motor neurons

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6
Q

Located in the posterior portion of the frontal lobe

A

Primary motor cortex

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7
Q

Where motor functions are organized before they are actually initiated in the primary motor complex

A

Premotor area

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8
Q

The motivation and foresight to plan and initiate movements

This region is well developed only in primates esp. humans

Involved in motivation and regulation of emotional behavior and mood

A

Frontal area

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9
Q

Important in controlling the speed and precision of skilled movements in hands

A

Lateral corticospinal tracts

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10
Q

Important in planning, organizing, and coordinating motor movements and posture

Group of functionally related nuclei

A

Basal nuclei

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11
Q

Located deep within the cerebrum

A

Corpus striatum

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12
Q

Group of darkly pigmented cells in the midbrain

A

Stantia nigra

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13
Q

Slight shaking of the hands when a person is not performing a task

A

Resting tremor (parkinson)

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14
Q

Attached by cerebellar peduncles to the brainstem

Involved in maintaining balance and muscle tone

If damaged, muscle tone decreases amd fine motor movements become clumsy

A

Cerebellum

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15
Q

Major function of cerebellum

Sensing device that compares the data from two sources— motor cortex and peripheral structures

A

Comparator

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16
Q

Reaching the cerebellum are action potentials from ________ which innervate joints, tendons and muscles, provide information about the position of body parts

A

Proprioceptive neurons