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Anatomy Arm and Forearm Muscles
Origins, Insertions, Actions and Innervations
144
Anatomy
Undergraduate 3
11/05/2013

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Term
Sternocleidomastoid Origin
Definition
Manubrium of sternum and medal clavicle
Term
Sternocleidomastoid Insertion
Definition
Mastoid process
Term
Sternocleidomastoid Action
Definition
Bilateral: Flex head and neck
Unilateral: laterally flex head and neck
Term
Sternocleidomastoid Innervation
Definition
Accessory Nerve
Term
Trapezius Origin
Definition
Occipital bone and spinous processes of cervical and thoracic vertebrae
Term
Trapezius Insertion
Definition
Acromion process, spine of scapula and lateral clavicle
Term
Trapezius Action
Definition
Superior: elevate scapula
Middle: retracts scapula
Inferior: depresses scapula
Term
Trapezius Innervation
Definition
Accessory Nerve
Term
Serratus Anterior Origin
Definition
Outer surface of ribs
Term
Serratus Anterior Insertion
Definition
Medial borer of scapula
Term
Serratus Anterior Action
Definition
protracts and depresses scapula
Term
Serratus Anterior Innervation
Definition
Brachial Plexus
Term
Rhomboideus Origin
Definition
Spinous processes of C7-T5
Term
Rhomboideus Insertion
Definition
Medial borer of scapula
Term
Rhomboideus Action
Definition
elevates and retracts scapula
Term
Rhomboideus Innervation
Definition
Brachial Plexus
Term
Levator Scapulae Origin
Definition
Transverse processes of C1-C4
Term
Levator Scapulae Insertion
Definition
Medial border of scapula
Term
Levator Scapulae Action
Definition
elevates scapula
Term
Levator Scapulae Innervation
Definition
Brachial Plexus
Term
Latissimus Dorsi Origin
Definition
Spinous processes of thoracic, lumbar and sacral vertebrae, iliac crest and lower ribs
Term
Latissimus Dorsi Insertion
Definition
Crest of lesser tubercle and intertubercular groove
Term
Latissimus Dorsi Action
Definition
extends, adducts, and medially rotates humerus
Term
Latissimus Dorsi Innervation
Definition
Brachial Plexus
Term
Teres Major Origin
Definition
Lateral border of scapula
Term
Teres Major Insertion
Definition
Crest of lesser tubercle
Term
Teres Major Action
Definition
extends, adducts, and medially rotates humerus
Term
Teres Major Innervation
Definition
Brachial Plexus
Term
Subscapularis Origin
Definition
SUbscapular fossa
Term
Subscapularis Insertion
Definition
lesser tubercle
Term
Subscapularis Action
Definition
adducts and medially rotates humerus
Term
Subscapularis Innervation
Definition
Brachial Plexus
Term
Deltoideus Origin
Definition
Acromion process, spine of scapula and lateral clavicle
Term
Deltoideus Insertion
Definition
Deltoid tuberosity
Term
Deltoideus Action
Definition
abducts, flexes, extends, medially and laterally rotates humerus
Term
Deltoideus Innervation
Definition
Axillary Nerve
Term
Teres Minor Origin
Definition
Lateral border of scapula
Term
Teres Minor Insertion
Definition
Posterior greater tubercle
Term
Teres Minor Action
Definition
Laterally rotates humerus
Term
Teres Minor Innervation
Definition
Axillary NErve
Term
Pectoralis Major Origin
Definition
Sternum, costal cartilages, and medial clavicle
Term
Pectoralis Major Insertion
Definition
crest of greater tubercle
Term
Pectoralis Major Action
Definition
adducts, medially rotates and flexes humerus
Term
Pectoralis Major Innervation
Definition
Brachial Plexus
Term
Pectoralis Minor Origin
Definition
Ribs 3-5
Term
Pectoralis Minor Insertion
Definition
coracoid process
Term
Pectoralis Minor Action
Definition
depresses and protracts scapula
Term
Pectoralis Minor Innervation
Definition
Brachial Plexus
Term
Supraspinatus Origin
Definition
Supraspinous fossa
Term
Supraspinatus Insertion
Definition
superior greater tubercle
Term
Supraspinatus Action
Definition
abducts humerus
Term
Supraspinatus Innervation
Definition
Brachial Plexus
Term
Infraspinatus Origin
Definition
Infraspinous fossa
Term
Infraspinatus Insertion
Definition
Posterior greater tubercle
Term
Infraspinatus ACtion
Definition
Laterally rotates humerus
Term
Infraspinatus Innervation
Definition
BRachial Plexus
Term
Triceps Brachii Origin
Definition
Long Head: Inferior glenoid fossa
Medial and Lateral Heads: Posterior surface of humerus
Term
Triceps Brachii Insertion
Definition
Olecranon process
Term
Triceps Brachii ACtion
Definition
extends forearm
Term
Triceps Brachii Innervation
Definition
Radial Nerve
Term
Coroacobrachialis Origin
Definition
Coracoid process
Term
Coroacobrachialis Insertion
Definition
Medial surface of humerus
Term
Coroacobrachialis Action
Definition
adducts and flexes forearm
Term
Coroacobrachialis Innervation
Definition
Musculocutaneous Nerve
Term
Brachialis Origin
Definition
Anterior surface of humerus
Term
Brachialis Insertion
Definition
coronoid process and ulnar tuberosity
Term
Brachialis ACtion
Definition
flexes forearm
Term
Brachialis Innervation
Definition
Musculocutaneous Nerve
Term
Biceps Brachii Origin
Definition
Long Head: Superior glenoid fossa
Short Head: coracoid process
Term
Biceps Brachii Insertion
Definition
Radial tuberosity
Term
Biceps Brachii Action
Definition
flexes forearm and supinates hand
Term
Biceps Brachii Innervation
Definition
Musculocutaneous Nerve
Term
Pronator Teres Origin
Definition
Medial epicondyle of humerus
Term
Pronator Teres Insertion
Definition
Lateral radius
Term
Pronator Teres Action
Definition
Pronates hand
Term
Pronator Teres Innervation
Definition
Median NErve
Term
Flexor Carpi Radialis Origin
Definition
Medial epicondyle of humerus
Term
Flexor Carpi Radialis Insertion
Definition
Base of metacarpals 2 & 3
Term
Flexor Carpi Radialis ACtion
Definition
flexes and abducts hand
Term
Flexor Carpi Radialis Innervation
Definition
Median Nerve
Term
Palmaris Longus Origin
Definition
medial epicondyle of humerus
Term
Palmaris Longus Insertion
Definition
Palmar aponerosis
Term
Palmaris Longus ACtion
Definition
Flexes hand
Term
Palmaris Longus Innervation
Definition
Median Nerve
Term
Flexor Carpi Ulnaris Origin
Definition
medial epicondyle of humerus
Term
Flexor Carpi Ulnaris Insertion
Definition
base of metacarpal 5, hamate and pisiform
Term
Flexor Carpi Ulnaris Action
Definition
flexes and adducts hand
Term
Flexor Carpi Ulnaris Innervation
Definition
Ulnar Nerve
Term
Flexor Digitorum Superficialis Origin
Definition
Medial epicondyle of humerus
Term
Flexor Digitorum Superficialis Insertion
Definition
Middle phalanges of fingers 2-5
Term
Flexor Digitorum Superficialis ACtion
Definition
flexes hand and fingers
Term
Flexor Digitorum Superficialis Innervation
Definition
Median Nerve
Term
Flexor Digitorum Profundus Origin
Definition
Anterior ulna and interosseous membrane
Term
Flexor Digitorum Profundus Insertion
Definition
Distal phalanges of fingers 2-5
Term
Flexor Digitorum Profundus ACtion
Definition
flexes hand and fingers
Term
Flexor Digitorum Profundus Innervation
Definition
Median and Ulnar Nerve
Term
Flexor Pollicis Longus Origin
Definition
Anterior radius and interosseous membrane
Term
Flexor Pollicis Longus Insertion
Definition
Distal phalanx of thumb
Term
Flexor Pollicis Longus ACtion
Definition
flexes thumb
Term
Flexor Pollicis Longus Innervation
Definition
Median nerve
Term
Pronator Quadratus Origin
Definition
Distal ulna
Term
Pronator Quadratus Insertion
Definition
distal radius
Term
Pronator Quadratus Action
Definition
pronates hand
Term
Pronator Quadratus Innervation
Definition
Median NErve
Term
Brachioradialis Origin
Definition
LAtral supracondylar crest of humerus
Term
Brachioradialis Insertion
Definition
Styloid process of radius
Term
Brachioradialis ACtion
Definition
flexes hand
Term
Brachioradialis Innervation
Definition
Radial Nerve
Term
Extensor Carpi Radialis Longus Origin
Definition
Lateral supracondylar crest and lateral epicondyle of humerus
Term
Extensor Carpi Radialis Longus Insertion
Definition
Base of metacarpal 2
Term
Extensor Carpi Radialis Longus ACtion
Definition
extends and abducts hand
Term
Extensor Carpi Radialis Longus Innervation
Definition
Radial Nerve
Term
Extensor Carpi Radialis Brevis Origin
Definition
Lateral epicondyle of humerus
Term
Extensor Carpi Radialis Brevis Insertion
Definition
Base of metacarpal 3
Term
Extensor Carpi Radialis Brevis Action
Definition
extends hand
Term
Extensor Carpi Radialis Brevis Innervation
Definition
Radial Nerve
Term
Extensor Digitorum Origin
Definition
lateral epicondyle of humerus
Term
Extensor Digitorum Insertion
Definition
Distal phalanges of fingers 2-5
Term
Extensor Digitorum ACtion
Definition
extend hand and fingers
Term
Extensor Digitorum Innervation
Definition
Radial Nerve
Term
Extensor Digiti Minimi Origin
Definition
Lateral epicondyle of humerus
Term
Extensor Digiti Minimi Insertion
Definition
Distal phalanx of finger 5
Term
Extensor Digiti Minimi ACtion
Definition
extend finger 5
Term
Extensor Digiti Minimi Innervation
Definition
Radial Nerve
Term
Extensor Carpi Ulnaris Origin
Definition
Lateral epicondyle of humerus and posterior ulna
Term
Extensor Carpi Ulnaris Insertion
Definition
Base of metacarpal 5
Term
Extensor Carpi Ulnaris Action
Definition
extend and adduct hand
Term
Extensor Carpi Ulnaris Innervation
Definition
Radial Nerve
Term
Abductor Pollicis Longus Origin
Definition
Posterior radius, ulna and interosseus membrane
Term
Abductor Pollicis Longus Insertion
Definition
base of metacarpal 1
Term
Abductor Pollicis Longus ACtion
Definition
abduct thumb and hand
Term
Abductor Pollicis Longus Innervation
Definition
Radial Nerve
Term
Extensor Pollicis Brevis Origin
Definition
Posterior radius adn interosseous membrane
Term
Extensor Pollicis Brevis Insertion
Definition
Proximal phalanx of thumb
Term
Extensor Pollicis Brevis Action
Definition
extends thumb and abducts hand
Term
Extensor Pollicis Brevis Innervation
Definition
Radial Nerve
Term
Extensor Pollicis Longus Origin
Definition
Posterior ulna and interosseus membrane
Term
Extensor Pollicis Longus Insertion
Definition
Distal phalanx of thumb
Term
Extensor Pollicis Longus Action
Definition
extends thumb and abducts hand
Term
Extensor Pollicis Longus Innervation
Definition
Radial Nerve
Term
Extensor Indicis Origin
Definition
Posterior ulna and interosseus membrane
Term
Extensor Indicis Insertion
Definition
Posterior surface of index finger
Term
Extensor Indicis ACtion
Definition
extends index finger
Term
Extensor Indicis Innervation
Definition
Radial Nerve
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