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Human Anatomy > Pectoral And Shoulder Muslces > Flashcards

Pectoral And Shoulder Muslces Flashcards

1
Q

Definition of origin

A

Attachment site of muscle that does not move during contraction

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2
Q

Definition of insertion

A

Attachment site of muscle that does move during contraction

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3
Q

Definition of innervation

A

Nerve distribution

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4
Q

Definition of action

A

Motion produced by muscle contraction

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5
Q

Definition of agonist

A

Muscle or group most directly related to the movement

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6
Q

Definition of antagonist

A

Muscle or group whose action is opposite to the agonist’s action.

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7
Q

Definition of synergist

A

Two or more muscles that work together to execute a motion

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8
Q

Fusifrom

A

Parallel

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9
Q

Unipennate

A

One side

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10
Q

Bipennate

A

Two sides

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11
Q

Multipennate

A

Many angles

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12
Q

Trapezius

A

N: Accessory ( cranial nerve 11)

A: upward rotation of the lateral scapular border ( upper and lower), scapular elevation (upper), scapular retraction ( middle), scapular depression ( lower)

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13
Q

Latissimus Dorsi

A

N: Thoracodorsal Nerve ( C6, C7, C8)

A: extends, adducts, internally rotates the humerus

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14
Q

Levator scapulae

A

N: anterior rami spinal nerves ( C3-C4) dorsal scapular nerve C5

A: scapular elevation, inferiorly rotates scapular

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15
Q

Rhomboid minor

A

Superior to the rhomboid major

N: Dorsa scapular nerve (C4-C5)

A: Retracts and elevates scapula

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16
Q

Rhomboid Major

A

Inferior to the rhomboid minor

N: Dorsal Scapular ( C4-C5)

A: retracts and elevates the scapula, plays a role in downward rotation of the scapula.

17
Q

Pectoralis Major

A

O: Clavicular head / Sternocostal end

N: lateral and medial pectoral nerves. Clavicular head (C5, C6), Sternocostal (C6,C7,C8,T1)

A: flexion, adduction,
medially rotates the glenohumeral joint.
Clavicular head flexes the extended arm,
Sternocostal head extends the flexed arm

Human Anatomy (4 decks)

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