Muscles That Move the Pectoral Girdle and Upper Limb
The muscles of the ______________ _______________ originate on the lateral epicondyle of the humerus and produce EXTENSION of the wrist, hand and fingers
Posterior compartment
Intrinsic muscles of the hand
Small muscles that both originate and insert on the hand
These nine have their origins on the scapula
- Deltoid - Coracobrachialis - Terese Major - Triceps brachii - Biceps brachii - Rotator cuff muscles (4); Subscapularis; Supraspinatus; Infraspinatus; Teres minor
Hypothenar group muscles affect the motion of finger 5 and include the following:
- Flexor digiti minimi brevis - Abductor digiti minimi - Opponens digiti minimi
Thenar group muscles affect the motion of the thumb and include the following:
- Flexor pollicis brevis - Abductor pollicis brevis - Opponens pollicis
These two have their origins on the axial skeleton
- Latissimus dorsi - Pectoralis major
Organized into groups based on
- Location in the body - Part of skeleton they move
Midpalmar group of muscles affect the motion of all fingers and the thumb, and include the following:
- Lumbricals - Dorsal interossei - Palmer interossei - Adductor pollicis
These muscle function to stabilize the scapula during activities of upper limb
- Pectoralis minor - Serratus anterior - Subclavius - Trapezius - Levator scapulae - Rhomboid minor - Rhomboid major
The two muscles located on the anterior forearm that pronate the forearm are:
- Pronator teres - Pronator quadratus
Muscles of the posterior compartment of the forearm (10 muscles)
- Superficial layer - Deep layer
The muscle located on the posterior forearm that supinates the forearm is:
- Supinator
Intrinsic Muscles of Hand divided into 3 groups
- Thenar group - Hypothenar group - Midpalmar group
The posterior compartment of the arm and forearm muscles that move the elbow joint/forearm, contain extensors of the forearm, such as:
- Triceps brachii - Anconeus
Muscles of the anterior compartment of the forearm (9 muscles)
- superficial layer - intermediate layer - deep layer
Deep layer of posterior forearm
1) Abductor pollicis longus 2) Extensor pollicis brevis 3) Extensor pollicis longus 4) Extensor inidcis 5) Supinator
Superficial layer of posterior forearm
1) Extensor carpi radialis longus 2) Extensor carpi radialis brevis 3) Extensor digitorum 4) Extensor digit minimi 5) Extensor carpi ulnaris
Specific Groups:
1) Muscles that move the pectoral girdle 2) Muscles that move the glenohumeral (shoulder) joint/arm 3) Muscles of arm and forearm that move elbow joint/forearm 4) Muscles of forearm that move wrist joint, hand and fingers 5) Intrinsic muscles of hand
Superficial layer of anterior forearm
1) Pronator teres 2) Flexor carpi radialis 3) Palmaris longus 4) Flexor carpi ulnaris
_________ muscles insert on the humerus and cause movement of the arm
11
Intermediate layer of anterior forearm
5) Flexor digitorum superficialis
Deep layer of anterior forearm
6) Flexor pollicis longus 7) Flexor digitorum profundus 8) Prontaor quadratus
____________ muscles move upper and lower limbs and stabilize pectoral and pelvic girdles
Appendicular
The muscles of the _______________ ______________ originate on the medial epicondyle of the humerus and produce FLEXION of the wrist, hand and fingers
Anterior compartment
The space between the carpal bones and the flexor retinaculum is the
Capral tunnel
Muscles of the anterior compartment cross over the anterior surface of the carpal bones and are held in place by the
Flexor retinaculum
Extrinsic Muscles
Most muscles that move the wrist joint, hand and fingers originate on the forearm