exercise 13 Flashcards

1
Q

antagonistic muscles

A

muscles that work in opposition to each other

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2
Q

agonist

A

muscle that gives movement desired

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3
Q

antagonist

A

muscle that opposes desired movement

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4
Q

wrist extension and flexion

A

flexion - flexor carpi radialis, flexor carpi ulnaris, palmaris longus
extension - extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris

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5
Q

arm wrestling

A

pronator teres and biceps brachii

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6
Q

what does an EMG measure

A

the changes in skin voltage as a result of the electrical activity of the skeletal muscles

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7
Q

The forearm is pronated in the winning position. Which muscle increased its EMG activity

A

pronator teres

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8
Q

how does the length of a muscle change when it perform a concentric contraction?

A

shortens

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9
Q

in the relaxed position

A

pronator teres and biceps brachii are at optimal length

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10
Q

in the winning position

A

pronator teres is less than optimal length

biceps brachii is greater than optimal length

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11
Q

in the losing position

A

pronator teres is greater than optimal length

biceps brachii is greater than optimal length

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12
Q

which muscles were agonist muscles during flexion

A

anterior muscles

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13
Q

which muscles were agonist muscles during extension

A

posterior muscles

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14
Q

tonus

A

constant maintenance of muscle tone

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