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Anatomy - Year One > Important Muscle Functions > Flashcards

Important Muscle Functions Flashcards

1
Q

Deltoid

A

Clavicular part: flexion and internal rotation of the arm

Acromial part: arm abduction

Spinal part: extension and external rotation of the arm

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2
Q

Bicep

A

Elbow joint: flexion

Proximal radioulnar joint: supination of forearm

Glenohumeral joint: (weak) flexor

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3
Q

Tricep

A

Elbow joint: forearm extension

Shoulder joint: extension and adduction of the arm (long head)

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4
Q

Anterior forearm

A

Flexion of the wrist and finger joints.

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5
Q

Posterior forearm

A

Wrist and/or finger extension and thumb abduction

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6
Q

External oblique

A

Bilateral contraction - Trunk flexion, compresses abdominal viscera, expiration

Unilateral contraction - Trunk lateral flexion (ipsilateral), trunk rotation (contralateral)

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7
Q

Internal oblique

A

Bilateral contraction - Trunk flexion,

Unilateral contraction - Trunk lateral flexion (ipsilateral), trunk rotation (ipsilateral)

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8
Q

Rectus abdominis

A

Trunk flexion,

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9
Q

Erector spinae

A

Bilateral contraction - extension of spine

Unilateral contraction - lateral flexion of spine (ipsilateral)

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10
Q

Anterior compartment of leg

A

Dorsiflexion

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11
Q

Posterior compartment of leg

A

Plantarflexion

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12
Q

Trapezius

A

Descending part (superior fibers)
- Scapulothoracic joint: draws scapula superomedially
- Atlantooccipital joint: extension of head and neck, lateral flexion of head and neck (ipsilateral)
- Altantoaxial joint: rotation of head (contralateral)

Transverse part (middle fibers)
- Scapulothoracic joint: draws scapula medially

Ascending part (inferior fibers)
- Scapulothoracic joint: Draws scapula inferomedially

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13
Q

Rhomboid major and minor

A

Scapulothoracic joint: Draws scapula superomedially, Rotates glenoid cavity inferiorly; Supports position of scapula

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14
Q

Quadriceps

A

Hip joint: Thigh flexion (rectus femoris only)

Knee joint: Leg extension

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15
Q

Hamstrings

A

Hip joint: Thigh extension

Knee joint: Leg flexion

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16
Q

Medial thigh

A

Adduction of the thigh

17
Q

Lateral leg compartment

A

Evertor of foot

Anatomy - Year One (26 decks)

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