Muscle Actions Flashcards
What are the actions of the upper trapezuis?
Elevation and upward rotation of the scapula
What is the action of the middle trapezuis?
Adduction of the scapula
What are the actions of the lower trapezius?
Depression and upward rotation of the scapula
What are the actions of the latissimus dorsi?
Extension, adduction and internal rotation of the humerus
What is the action of the teres minor?
External rotation of the humerus
What are the actions of the teres major?
Extension, adduction, and internal rotation of the humerus
What is the action of the supraspinatus?
Abduction of the humerus
What is the action of the infraspinatus?
External rotation of the humerus
What are the actions of the rhomboid major?
Downward rotation and adduction of the scapula
What are the actions of the rhomboid minor?
Downward rotation and adduction of the scapula
What is the action of the triceps brachii- long head?
Extension at shoulder/ elbow joint
What are the actions of the erector spinae group (thoracic and lumbar) muscles?
Extension, lateral flexion, and rotation of the vertebral column
What are the actions of the quadratus lumborum?
Ipsilateral lateral flexion of vertebral column
Ipsilateral pelvic elevation
What are the actions of the gluteus maximus?
Extension and external rotation of the femur
What are the actions of the biceps femoris- long head?
Extension of femur at leg
Flexion of leg at knee
What are the actions of the biceps femoris- short head?
Flexion of leg
What are the actions of the semitendinosus?
Extension of femur at leg
Flexion of leg at knee
What are the actions of the semimembranosous?
Extension of femur at leg
Flexion of leg at knee
What are the actions of the gastrocnemius?
Plantar flexion of foot
Flexion of leg
What is the action of the soleus?
Plantar flexion
What is the action of the sternocleidomastoid?
Flexion of cervical spine
What are the actions of the pectoralis major?
Adduction, internal rotation, flexion, extension and horizontal abduction of the humerus
What are the actions of the serratus anterior?
Upward rotation and abduction of the scapula
What are the actions of the rectus femoris?
Flexion of femur
Extension of leg at knee joint
What is the action of the vastus medialis?
Extension of leg at knee joint
What is the action of the vastus lateralis?
Extension of leg at knee joint
What are the actions of the tensor fasciae latae?
Flexion, internal rotation and abduction of the femur
What are the actions of the sartorius?
Flexion of the hip
External rotation and abduction of femur
Flexion of leg at the knee
What are the actions of the tibialis anterior?
Dorsiflexion
Inversion of foot
What are the actions of the gluteus medius?
Abduction and internal rotation of the femur
What are the actions of the gluteus minimus?
Abduction and internal rotation of the femur
What are the actions of the gracilis?
Adduction of the femur
Flexes leg at the knee
What is the action of the adductor brevis, adductor longus, adductor magnus and pectineus?
Adduction of the femur
What are the actions of the anterior deltoid?
Internal rotation, flexion and horizontal adduction of the humerus
What is the action of the middle deltoid?
Abduction of the humerus
What are the actions of the posterior deltoid?
Extension, horizontal abduction and external rotation of the humerus
What are the actions of the biceps brachii- short head?
Flexion of humerus
Flexion of forearm at elbow
Supination of forearm at radioulnar joint
What are the actions of the biceps brachii- long head?
Flexion of forearm at elbow
Supination of forearm
What is the action of the brachialis?
Flexion of the forearm at elbow joint
What are the actions of the brachioradialis?
Flexion of forearm at elbow joint
Supination and pronation of forearm
What is the action of the common flexor tendons?
Flexion
What are the actions of the flexor carpi radialis?
Flexion and radial deviation of the wrist
What is the action of the palmaris longus?
Flexion of the wrist
What are the actions of the flexor carpi ulnaris?
Flexion and ulnar deviation of the wrist
What are the actions of the digitorum superficilalis?
Flexion of PIP, MCP joints of digits 2-5
Assists wrist with flexion
What is the action of the opponens pollicis?
Opposition of CNC joint of the thumb
What is the action of the abductor pollicis brevis?
Abduction of the thumb
What is the action of flexor pollicis brevis?
Flexion of the thumb
What is the action of the abductor digiti minimi
Abduction of 5th digit (pinky)
What is the action of the flexor digiti minimi?
Flexion of the 5th digit (pinky)
What is the action of the opponens digiti minimi?
Opposition of the 5th digit (pinky)
What is the action of the palmaris brevis?
Tightens aponeurosis and grip
What is the action of the common extensor tendon?
Extension
What are the actions of the extensor carpi radialis longus?
Extension and radial deviation of the wrist
What are the actions of the extensor carpi radialis brevis?
Extension and radial deviation of the wrist
What are the actions of the extensor carpi ulnaris?
Extension and ulnar deviation of the wrist
What are the actions of the extensor digitorum?
Extension of MCP, PIP, DIP joints digits 2-5
Wrist extension
What are the actions of the extensor pollicis longus?
Extension of thumb
Radial deviation of wrist
What are the actions of the extensor pollicis brevis?
Extension of thumb
Assists in radial deviation of the wrist
What are the actions of the abductor pollicis longus?
Abduction and extension of the thumb
Radial deviation of the wrist