-
-
Orbicularis oris
- Compresses, purses lips
- kissing muscle
- (mouth)
-
Depressor anguli oris
- Depresses corner of mouth
- (mouth)
-
Zygomaticus
- Draws corner of mouth back and up
- (mouth)
-
-
Frontalis
- Raises eyebrows, wrinkles forehead
- (Scalp)
-
Occipitalis
- Tenses and retracts scalp
- (Scalp)
-
Masseter
- Elevates mandible
- (Lower Jaw)
-
Temporalis
- Elevates mandible
- (Lower Jaw)
-
Platysma
- Tenses skin of neck, depresses mandible
- (neck)
-
Sternohyoid
- Depresses hyoid bone and larynx
- (neck)
-
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Sternocleidomastoid
- Both sides together flex the neck
- one side alone bends head toward shoulder and
- turns face to opposite side
- (neck)
-
Pharyngeal
- constricts the throat during swallowing
- (neck)
-
External intercostals
- Elevate ribs
- (thoracic region)
-
Internal intercostals
- Depress ribs
- (thoracic region)
-
Diaphragm
- Contraction expands thoracic cavity
- compresses abdominopelvic cavity
- (thoracic region)
-
External oblique
- compresses abdomen
- depresses ribs
- flexes or laterally flexes vertebral column
- (abdominal region)
-
Internal oblique
- compresses abdomen
- depresses ribs
- flexes or laterally flexes vertebral column
- (abdominal region)
-
Rectus abdominis
- Depresses ribs
- flexes vertebral column
- (abdominal region)
-
Levator ani
- closes anal opening
- Tenses floor of pelvis
- supports pelvic organs
- flexes coccyx
- elevates and retracts anus
- (external anal sphincter)
-
Levator scapulae
- elevates scapula
- (shoulder)
-
Pectoralis minor
- Depresses and protracts shoulder
- rotates scapula laterally(downward)
- elevates ribs if scapula is stationary
- (shoulder)
-
Rhomboid muscles
- Adducts and rotates scapula leterally(downward)
- (shoulder)
-
Serratus anterior
- Protracts shoulder
- abducts and medially rotates scapula(upward)
- (shoulder)
-
Trapezius
- depends on active region and state of other muscles
- may elevate, adduct, depress, or ratate scapula and/or elevate clavicle
- can also extend or hyperextend neck
- (shoulder)
-
Deltoid
- abduction at shoulder
- (arm)
-
Latissimus dorsi
- Extension, adduction, and medial rotation at shoulder
- (arm)
-
Pectoralis major
- Flexion, adduction, and medial rotation at shoulder
- (arm)
-
Infraspinatus
- lateral rotation at shoulder
- (arm)
-
Teres minor
- Lateral rotation at shoulder
- (arm)
-
Teres major
- Adduction and medial rotation at shoulder
- (arm)
-
Biceps brachii
- Flexion at shoulder and elbow
- supination
-
Brachialis
flexion at elbow
-
Brachioradialis
flexion at elbow
-
Triceps brachii
extension at elbow
-
Gluteus maximus
- extension and lateral rotation at hip
- (gluteal group)
-
Gluteus medius
- abduction and medial rotation at hip
- (gluteal group)
-
Tensor fasciae latae
- Flexion, abduction,and medial rotation at hip
- tenses fascia lata, which laterally supports the knee
- (gluteal group)
-
Adductor longus
- adduction, flexion,and medial rotation at hip
- (adductor group)
-
Gracilis
- flexion at knee
- adduction and medial rotation at hip
- (adductor group)
-
Iliacus
- flexion at hip and/or lumbar intervertebral joints
- (iliopsoas group)
-
Psoas major
- flexion at hip and/or lumbar intervertebral joints
- (iliopsoas group)
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