Lecture exam 2 -upper limbs Flashcards
Muscles of the scapula
trapezius Rhomboids (major/minor) Elevator scapulae Pectoralis minor Serratus anterior
Function of trapezius
elevates and retracts scapula
Function of the rhomboids
elevate and retract scapula
Function of elevator scapulae
elevates scapula
Function of pectoralis minor
protracts and depresses scapula
Function of serratus anterior
protracts and depress scapula
Muscles that move the arm glenhumeral joint
pectoralis major
Latissimus dorsi
Function of pectoralis major
flexes and abducts arm
Function of latissimus
extends and adducts arm
Function of deltoid
abducts, flexes, and extends the arm
- anterior fibers flex
- posterior fibers extend
function of coracobrachialis
flexes and abducts arm
Function of teres major
Extends arm and abducts arm
Muscles originating on scapulae
deltoid
Coracobrachialis
Teres major
Muscles of rotator cuff
subscapularis
Supraspinatus
Infraspinatus
Teres minor
Function of subscapularis
medially rotates arm
wind up for a pitch
Function of supraspinatus
abducts arm
execute pitch
Function of infraspinatus
Literally rotates arm
finish pitch, slow down pitching arm
Function of Teres minor
laterally rotates arm
finish pitch, slow down pitching arm
what are the anterior arm muscles and their function
flexors
- biceps brachii
- brachialis
- brachloradialis
what arm muscle supinates the forearm
biceps brachii
what are the posterior arm muscles and their function
extensors
- triceps brachii
- anconeus
function of forearm muscles
flex arm/digits
function of posterior forearm muscles
extend arm/wrist
what are the pronators of anterior forearm
pronator teres
pronator quadratus
function of the anterior forearm muscles
flex wrist, MP and/or IP joints
most originate from medial epicondyle of humerous
what is the flexor retinaculum
band of dense regular CT to hold flexor tendons close to bone, space underneath flexor retinacolumn is the carpal tunnel
what are the superficial group of anterior forearm muscles
flexor carpi radialis
palmaris longus
flexor carpi ulnaris
function of the flexor carpi radialis
flexes wrist and abducts hand
function of palmaris longus
flexes wrist
function of flexor carpi ulnaris
flexes wrist and abducts hand
what are the intermediate anterior forearm muscles
flexor digitorium superficialis
tendons attach to middle phalanges
function of the flexor digitorium superficialis
flexes wrist and flexes digits 2-5 at the MP and PIP joints
what are the deep anterior forearm muscles
flexor digitorium profundus
flexor pollicis longus
function of flexor digitorium profundus
flexes wrist and digits 2-5 at the MP, PIP, and DIP joints (tendons attach to distal phalanges)
function of flexor pollicis longus
flexes wrist, MP joint, IP joint of the thumb
function of posterior forearm muscles
extensors of the wrist, MP and/or
IP joints
(most originate from the lateral epicondyle of humerous)
function of superficial posterior forearm muscles
extensor carpi radialis longus
extensor carpi radialis brevis
extensor carpi ulnaris
extensor digitorum
function of extensor carpi radialis longus
extends wrist and abducts hand
function of extensor carpi radialis brevis
extends wrist and abducts hand
function of extensor carpi ulnaris
extends wrist and abducts hand
function of extensor digitorum
extends wrist and digits 2-5 at MP, PIP and DIP joints
what are the deep posterior forearm muscles
extensor pollicis longus
extensor pollicis brevis
abductor pollicis longus
what is the function of the extensor pollicis longus
extends thumb
function of extensor pollicis brevis
extends thumb
function of abductor pollicis longus
abducts thumb
what are the hand muscles
thenar muscles
hypothenar muscles
midpalmar muscles
function of thenar muscles
move thumb
function of hypothenar muscles
move pinky
function of midpalmar muscles
all muscles flex MP joints and extend PIP/DIP joints of fingers 2-5
name the midpalmar muscles
lumbricals (4) palmar interossei (3) dorsal interossei (4)
PAD-DAB reference meaning
(Palmar interossei ADduct, Dorsal interossei ABducts)