Muscle attachment questions

CSU BMS 301

What originates and inserts at the coracoid process?

coracobrachialis and short head of biceps brachii originate, pectoralis major inserts

What originates at each border of the scapula?

levator scapulae inserts at the superior angle, the rhomboids and serratus anterior attach at the vertebral border, teres major originates at the inferior border, teres minor originates at the lateral border

What inserts at the intertubercular groove?

Pectoralis major, latissimus dorsi, teres major

What inserts at the tubercules of the humerus?

teres minor, supra and infraspinatus insert at the greater tubercle. subscapularis inserts at the lesser tubercle

list origins and insertions to the humerus

brachialis, lateral, and medial heads of triceps brachii originate at the humerus, coracobrachialis inserts

Which flexors insert at metacarpals?

flexor carpi radialis at the 2nd metacarpal, flexor carpi ulnaris at the 5th metacarpal

Which flexors insert at phalanges?

flexor digitorum superficialis at the middle phalanges (digits 2-5), flexor digitorum profundus at distal phalanges (digits 2-5), flexor pollicis longus at the distal phalanx of digit 1

Which extensors insert at metacarpals?

abductor pollicis longus at metacarpal 1, extensor carpi radialis longus at metacarpal 2, extensor carpi radialis brevis at metacarpal 3, extensor carpi ulnaris at metacarpal 5

Which extensors insert at phalanges?

extensor digitorum at the middle and distal phalanges (digits 2-5), extensor pollicis longus at the proximal phalanx of digit 1, extensor pollicis brevis at the distal phalanx of digit 1

Which extensors originate at the interosseus membrane (NOT the lateral epicondyle)?

abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus

Which hand muscles originate at the flexor retinaculum?

abductor pollicis brevis, flexor pollicis brevis, opponens pollicis, abductor digiti minimi, flexor digiti minimi, opponens digiti minimi

Which hand muscles originate at metacarpals?

dorsal and palmar interossei, adductor pollicis at metacarpals 2 and 3

Which hand muscles insert at phalanges?

abductor pollicis brevis and flexor pollicis brevis at the proximal phalanx of digit one, abductor digiti minimi and flexor digiti minimi at the proximal phalanx of digit 5

Which hand muscles insert at metacarpals?

opponens pollicis and adductor pollicis at metacarpal 1, opponens digiti minimi at metacarpal 5

What is a special function of the lumbricals?

They can flex the mp joint while extending the ip joint, balancing forces

Which shoulder muscles help with rotation?

latissimus dorsi, teres major + minor, subscapularis, pectoralis major, and infraspinatus

Which shoulder muscles help with abduction?

serratus anterior, deltoids, and supraspinatus

What is the primary elbow flexor?

brachialis