Lecture 4 Muscles from slides 11-22

what muscle is this

biceps brachii

what are the actions of the biceps brachii

flexion and supination

what are origins if the biceps brachii short head

coracoid process

what are the origins of the long head of the biceps

supraglenoid tubercle of scapula, labrum

what is the insertion of the biceps brachii

tuberosity of the radius and aponeurosis of biceps brachii

what belly is more medial to the body for biceps

short head

what belly is more lateral to the body for the biceps

long head

anything that inserts to the radius causes

pronation, supination

what exercise is a bicep most active

bicep curl

the flexors of the elbow are more

medial to the body

the extensors of the elbow are more

lateral to the body

if we are more pronated or supinated what muscle pulls us back to neutral

brachioradialis

what exercise palpates the brachioradialis and targets it best

hammer curls

what muscle is this

brachioradialis

what are the actions of the brachioradialis

flex the elbow, pronate and supinate (neutral)

what is the origin of the brachioradialis

lateral supracondylar ridge of humerus

what is in the insertion of the brachioradialis

styloid process of radius

what muscle is this

triceps brachii long head and lateral head

what muscle belly is more medial to the body of the triceps

long head

what muscle belly is more lateral of the triceps

lateral head of triceps

what muscle is this

triceps medial head

where is triceps medial head located

deep and between the long and lateral head

what is the action for the triceps brachii (all heads)

extension of elbow

what is the action of the triceps long head

extension and adduction of glenohumeral joint

what is the origin of the triceps long head

infraglenoid tubercle of scapula

what is the origin of the triceps lateral head

posterior surface of proximal half of humerus

what is the origin of medial head of triceps

posterior surface of distal half of humerus

what is the insertion of the triceps brachii

olecranon process of ulna

anconeus is not like other muscles because its insertion is

bigger than its insertion

what muscle is this

anconeus

what is the action of the anconeus

extend the elbow

what is the origin of anconeus

lateral epicondyle of humerus

what is the insertion of the anconeus

olecranon process and posterior, proximal surface of ulna

what muscle is this

supinator

what are the actions of the supinator

supination

what is the origin of the supinator

lateral epicondyle of humerus, radial collateral ligament, annular ligament, and supinator crest of ulna

what the insertion of the supinator

anterior, lateral surface of proximal one-third of radial shaft

what muscle is this

pronator teres

what is the action of the pronator teres

pronate the forearm, assisting in flexing elbow

what is the origin of the pronator teres

medial epicondyle

what is the insertion of the pronator teres

middle of lateral surface of radius

what muscle is this

pronator quadratus

what is the action of the pronator teres

pronate the forearm

what is the origin of pronator quadratus

medial, anterior surface of distal ulna

what is the insertion of the pronator quadratus

lateral, anterior surface of distal radius