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Origins, Insertions, Actions & Innervations
Teres major up through pronator quadratus
71
Anatomy
Undergraduate 4
06/03/2009

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Cards

Term
What is the origin of the teres major?
Definition
lower 1/3rd of the scapula's lateral border
Term
What is the insertion of the teres major?
Definition
medial lip of the bicipital groove of the humerus
Term
What is the action of the teres major?
Definition

1. internally rotates the arm

2. extends the arm (from a flexed position)

Term
What is the innervation of the teres major?
Definition
lower subscapular
Term
What is the origin of the subscapularis?
Definition
subscapular fossa
Term
What is the insertion of the subscapularis?
Definition

1. lesser tubercle of the humerus

2. lower part of the capsule of the shoulder joint

Term
What is the action of the subscapularis?
Definition
internally rotates the arm
Term
What is the innervation for the subscapularis?
Definition
upper and lower subscapular
Term
What is the origin of the subclavius?
Definition
first rib
Term
What is the insertion of the subclavius?
Definition
inferior surface of clavicle
Term
What is the action of the subclavius?
Definition

no direct action

assists to stabilize the scapula

Term
What is the innervation for the subclavius?
Definition
nerve to the subclavius
Term
What is the origin of the pectoralis major?
Definition

1. medial portion of the clavicle

2. sternum at costal cartilages

Term
What is the insertion of the pectoralis major?
Definition
lateral lip of the biciptal groove
Term
What is the action of the pectoralis major?
Definition

1. adducts the arm

2. internally rotates the arm

3. flexes the shoulder (from an extended position)

Term
What is the innervation of the pectoralis major?
Definition

1. clavicular portion: lateral pectoral

2. sternal portion: medial pectoral

Term
What is the origin of the pectoralis minor?
Definition
outer surface of ribs 3-5
Term
What is the  insertion of pectoralis minor?
Definition
coracoid process
Term
What is the action of the pectoralis minor?
Definition

1. depresses the scapula

2. downwardly rotates the scapula

Term
What is the innervation of the pectoralis minor?
Definition
medial pectoral
Term
What is the origin of the coracobrachialis?
Definition
coracoid process
Term
What is the insertion of the coracobrachialis?
Definition
medial shaft of humerus at about its middle
Term
What is the action of the coracobrachilais?
Definition

1. flexes the shoulder

2. assists to adduct the humerus

Term
What is the innervation of the coracobrachialis?
Definition
musculocutaneous
Term
What is the origin of the biceps brachii?
Definition

1. long head: supraglenoid tubercle and glenohumeral labrum

2. short head: coracoid process

Term
What is the insertion of the biceps brachii?
Definition
radial tuberosity
Term
What is the action of the biceps brachii?
Definition

1. flexes the elbow (when supinated)

2. supinates the forearm from neutral

3. flexes shoulder (weak)

Term
What is the innervation of the biceps brachii?
Definition
musculocutaneous
Term
What is the origin of the brachialis?
Definition
lower half of anterior humerus
Term
What is the insertion of the brachialis?
Definition

1. ulnar tuberosity

2. coronoid process

Term
What is the action of the brachialis?
Definition
flexes the elbow
Term
What is the innervation of the brachialis?
Definition
musculocutaneous
Term
What is the origin of the triceps brachii?
Definition

long head: infraglenoid tubercle

lateral head: upper half of the posterior humerus

medial head: lower 1/4th of posterior humerus

Term
What is the insertion of the triceps brachii?
Definition
olecranon process
Term
What is the action of the triceps brachii?
Definition

1. long head: extends the elbow & shoulder

2. lateral head: elbow extension

3. medial head: elbow extension

Term
What is the innervation of the triceps brachii?
Definition
radial
Term
What is the origin of the anconeus?
Definition
lateral epicondyle of the humerus
Term
What is the insertion of the anconeus?
Definition
lateral surface of the olecranon process
Term
What is the action of the anconeus?
Definition

1. elbow extension

2. supports the elbow when in full extension

Term
What is the innervation of the anconeus?
Definition
radial
Term
What is the origin of the pronator teres?
Definition

1. humeral head: upper portion of medial epicondyle via the CFT

2. ulnar head: coronoid process of ulna

Term
What is the insertion of pronator teres?
Definition

pronator tuberosity of radius

(rough area for pronator teres)

Term
What is the action for the pronator teres?
Definition

1. pronates forearm

2. weakly flexes elbow

 

Term
What is the innervation for pronator teres?
Definition
median
Term
What is the origin of flexor carpi radialis?
Definition
media epicondyle via the CFT
Term
What is the insetion for the flexor carpi radialis?
Definition
base of 2nd and sometimes 3rd metacarpals on the palmar side of the hand
Term
What is the action for the flexor carpi radialis?
Definition

1. flexes wrist

2. radial deviation

Term
What is the origin for palmaris longus?
Definition
medial epicondyle via CFT
Term
What is the insertion for palmaris longus?
Definition
superficial portion of the palmar aponeurosis
Term
What is the action of the palmaris longus?
Definition
flexes wrist
Term
What is the innervation of palmaris longus?
Definition
median
Term
What is the origin of flexor carpi ulnaris?
Definition

1. humeral head: medial epicondyle via CFT

2. ulnar head: upper portion of the posterior ulna

Term
What is the insertion for flexor carpi ulnaris?
Definition

1. pisiform & hamate bones

2. base of the 5th metacarpal

Term
What is the action of flexor carpi ulnaris?
Definition

1. flexes wrist

2. ulnar deviation

Term
What is the innervation of flexor carpi ulnaris?
Definition
ulnar
Term
What is the origin of flexor digitorum superficialis?
Definition

1. humeral-ulnar head: medial epicondyle via CFT

2. radial head: oblique line of radius

Term
What is the insertion of flexor digitorum superficials?
Definition
splits to both sides of the base of each middle phalanx of the 4 fingers
Term
What is the action of the flexor digitorum superficialis?
Definition
flexes the proximal and middle IP joints
Term
What is the innervation of flexor digitorum superficialis?
Definition
median
Term
What is the origin of flexor digitorum profundus?
Definition
anterior & medial surface of proximal 3/4 of ulna
Term
What is the insertion of flexor digitorum profundus?
Definition

distal phalanx of medial 4 digits

(through the FDS tunnel)

Term
What is the action of the flexor digitorum profundus?
Definition
flexes the distal IP joints and in so doing flexes the proximal and middle IP joints
Term
What is the  innervation of flexor digitorum profundus?
Definition

medial portion: ulnar

lateral portion: median

Term
What is the origin of flexor pollicis longus?
Definition
middle of anterior radius and interosseous membrane (sometimes as high as the coronoid process of ulna)
Term
What is the insertion of flexor pollicis longus?
Definition
palmar aspect of base of the distal phalanx of thumb
Term
What is the action of the flexor pollicis longus
Definition
flexes the distal phalanx of thumb
Term
What is the innervation of flexor pollicis longus?
Definition
median
Term
What is the origin for pronator quadratus?
Definition
distal 1/4 anteromedial surface of ulna
Term
What is the insertion of pronator quadratus?
Definition
distal 1/4 of anterolateral surface of radius
Term
What is the action of pronator quadratus?
Definition
pronates the forearm and hand
Term
What is the innervation of pronator quadratus?
Definition
median
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