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Actions of all muscles
Movements of Specific areas as well
80
Anatomy
Graduate
10/02/2016

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Cards

Term
Trapezius action
Definition
Descending: draw scapula obliquely upward, rotate glenoid cavity superiorly, tilt head to same side, rotate head to opposite side
Transverse: draw scapula medially (adduct)
Ascending: draw scapula medially downward
All parts: steady scapula on thorax
Term
Latissimus dorsi action
Definition
Interally rotate upper limb
Adduct upper limb
Extend upper limb
Term
Levator scapulae action
Definition
Draw scaupla medially upward, incline neck to same side
Term
Rhomboids action
Definition
Steady scapula; draw scapula medially upward
Term
Serratus posterior superior action
Definition
Elevate ribs
Term
Serratus posterior inferior action
Definition
Depress ribs
Term
Splenius capitis and cervicis action
Definition
Bilaterally extend cervical spine and head
Unilaterally flex and rotate head to same side
Term
Iliocostalis action
Definition
Bilaterally extend spine
Unilaterally bend spine ipsilaterally
Term
Longissimus action
Definition
Bilaterally extend spine
Unilaterally bend spine ipsilaterally
Term
Spinalis action
Definition
Bilaterally extend cervical and thoracic spine
Unilaterally bend cervical and thoracic spine ipsilaterally
Term
Semispinalis capitis action
Definition
Bilaterally extend cervical spine and head
Unilaterally bend head/cervical spine ipsilaterally, rotate to opposite side
Term
Rotatores action
Definition
Bilaterally extend thoracic spine
Unilaterally rotate spine contralaterally
Term
Multifidus action
Definition
Bilaterally extend spine
Unilaterally flex spine ipsilaterally, rotate spine contralaterally
Term
Levatores action
Definition
Bilaterally extend thoracic spine
Unilaterally bend spine ipsilaterally, rotate spine contralaterally
Term
Rectus capitis posterior major/minor action
Definition
Bilateral: extend head
Unilateral: rotate head ipsilaterally
Term
Obliquus capitis superior action
Definition
Bilateral: Extend head
Unilateral: Tilt head to same side; rotate to opposite side
Term
Obliquus capitis inferior action
Definition
Bilateral: Extend head
Unilateral: Rotate head to same side
Term
Deltoid action
Definition
Flex, internally rotate arm; abduct arm at shoulder; extend, externally rotate arm
Term
Teres minor action
Definition
Externally rotate arm, weakly adduct arm at shoulder joint
Term
Teres major action
Definition
Internally rotate, adduct, extend arm at shoulder joint
Term
Triceps brachii long head action
Definition
Extend forearm at elbow joint; extend and adduct arm at shoulder
Term
Supraspinatus action
Definition
Abduct arm at shoulder joint (first 15 degrees)
Term
Infraspinatus action
Definition
Externally rotate arm at shoulder
Term
Triceps brachii lateral head action
Definition
Extend forearm at elbow joint; Extend and adduct arm at shoulder
Term
Triceps brachii medial head action
Definition
Extend forearm at elbow joint; extend and adduct arm at shoulder
Term
Anconeus action
Definition
Extend forearm at elbow, stabilize elbow joint
Term
Pectoralis major action
Definition
Adduct and internally rotate arm at shoulder; assist in respiration when shoulder is fixed
Term
Pectoralis minor action
Definition
Draw scapula downward; rotate glenoid inferiorly, assist in respiration
Term
Subscapularis action
Definition
Internally rotate arm at shoulder joint
Term
Serratus anterior action
Definition
Raise and lower arm beyond 90 degrees; rotate scapula laterally; draw scapula laterally forward and elevate ribs when shoulder fixed
Term
Sternocleidomastoid action
Definition
Unilaterally tilt head ipsilaterally, rotate head contralaterally
Bilaterally extend head, aid in respiration with fixed head
Term
Platysma action
Definition
Depress and wrinkle skin of face and mouth, tense skin of neck, depress mandible
Term
Anterior scalene action
Definition
Elevate upper ribs during forced respiration
Unilaterally bend cervical spine ipsilaterally
Bilaterally flex neck
Term
Middle scalene action
Definition
Elevate ribs during forced respiration
Unilaterally bend cervical spine ipsilaterally
Bilaterally flex neck
Term
Posterior scalene
Definition
Elevate ribs during forced respiration
Unilaterally bend cervical spine ipsilaterally
Bilaterally flex neck
Term
Biceps brachii action
Definition
Flex elbow, supinate forearm; flex, abduct and internally rotate arm at shoulder
Term
Coracobrachialis action
Definition
Flex, abduct, internally rotate arm at shoulder
Term
Brachialis action
Definition
Flex elbow joint, strongest
Term
Brachioradialis action
Definition
Weak flexor of forearm at elbow; most effective midpronated
Term
Pronator teres action
Definition
Pronate forearm, weakly flex forearm at elbow
Term
Flexor carpi radialis action
Definition
Flex and abduct hand at wrist
Term
Palmaris longus action
Definition
Weakly flex arm at elbow; tighten palmar aponeurosis
Term
Flexor carpi ulnaris action
Definition
Flex and adduct hand at wrist
Term
Flexor digitorus superficialis action
Definition
Flex hand at wrist; flex 2-5 digits at MCP and PIP joints; weakly flex arm at elbow
Term
Flexor pollicis longus action
Definition
Flex hand at wrist, flex thumb at MCP joint, CMC joint and IP joint
Term
Flexor digitorum profundus action
Definition
Flex hand at wrist, flex 2-5 digits at MCP, PIP, and DIP joints
Term
Pronator quadratus action
Definition
Pronate hand, stabilize distal radioulnar joint
Term
Palmaris brevis action
Definition
Tighten palmar aponeurosis
Term
Lumbrical action
Definition
Flex 2-5 MCP joints, extend 2-5 PIP and DIP joints
Term
Abductor pollicis brevis action
Definition
Abduct thumb at CMC joint
Term
Flexor pollicis brevis action
Definition
Flex thumb at CMC joint
Term
Opponens pollicis action
Definition
Oppose thumb at CMC joint
Term
Abductor digiti minimi action
Definition
Flex and abduct 5th digit at MCP joint, extend 5th digit at PIP and DIP joints
Term
Flexor digiti minimi action
Definition
Flex 5th digit at MCP joint
Term
Opponens digiti minimi action
Definition
Oppose 5th digit
Term
Adductor pollicis action
Definition
Adduct thumb at CMC joint, flex thumb at MCP joint
Term
Palmar interossei action
Definition
Flex 2, 4, 5 digits at MCP, extend them at DIP, PIP; adduct 2, 4, 5 digits towards 3rd digit
Term
Extensor carpi radialis longus action
Definition
Weakly flex forearm at elbow; extend and abduct hand at wrist
Term
Extensor carpi radialis brevis action
Definition
Weakly flex forearm at elbow; extend and abduct hand at wrist
Term
Extensor digitorum action
Definition
Extend wrist, extend MCP, PIP and DIP joints
Term
Extensor digiti minimi action
Definition
Extend wrist, extend 5th digit at MCP, DIP and PIP joints; abduct hand and 5th digit
Term
Extensor carpi ulnaris action
Definition
Extend and adduct hand at wrist
Term
Abductor pollicis longus action
Definition
Abduct hand at radiocarpal joint; abduct thumb at CMC joint
Term
Extensor pollicis brevis action
Definition
Abduct hand at radiocarpal joint; extend thumb at CMC and MCP joints
Term
Extensor pollicis longus action
Definition
Abduct hand at wrist; adduct thumb at CMC; extend thumb at MCP and IP joints
Term
Extensor indicis action
Definition
Extend hand at wrist, extend 2nd digit at MCP, PIP, DIP joints
Term
Supinator action
Definition
Supinate arm at radioulnar joint
Term
Dorsal interossei action
Definition
Flex 2-4 digits at MCP joint, extend 2-4 digits at PIP and DIP joints, abduct 2-4 digits away from 3rd digit
Term
Scapula elevation
Definition
Trapezius, levator scapulae, rhomboids
Term
Scapula depression
Definition
Trapezius, gravity
Term
Scapula protraction
Definition
Serratus anterior, (hunching)
Term
Scapula retraction
Definition
Trapezius, rhomboids
Term
Scapula upward rotation
Definition
Trapezius, serratus anterior
Term
Scapula downward rotation
Definition
Levator scapulae, rhomboids
Term
Glenohumeral joint arm flexion
Definition
Pectoralis muscles and deltoid
Term
Glenohumeral joint arm extension
Definition
Latissimus dorsi and deltoid
Term
Glenohumeral joint arm abduction
Definition
Supraspinatus, deltoid, serratus anterior
Term
Glenohumeral joint arm adduction
Definition
Pectoralis major, latissimus dorsi, teres major
Term
Glenohumeral joint medial rotation
Definition
Subscapularis, pectoralis major, anterior deltoid, latissimus dorsi, teres major
Term
Glenohumeral joint lateral rotation
Definition
Infraspinatus, teres minor, posterior deltoid
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