Flex your forearm (hand supinated) against resistance, which muscle are you using?
Biceps brachii
If you try to extend the forearm against resistance, which muscle are you using?
Triceps brachii
When you flare your fingers, which muscle on the dorsum of the hand is exposed?
Extensor digitorum
The muscles that act on the upper limb fall into what 3 groups?
1. Those that move the arm
2. Those that move the forearm
3. Those that move the hand and fingers
The muscles that cross the shoulder joint insert on which bone and moves which part of the body?
Insert on the humerus and move the arm.
The muscles that cross the shoulder joint and insert on the humerus and move the arm are primarily which group of muscles?
The trunk muscles
Trunk muscles originate on which body feature?
Shoulder girdle
The muscles which cross the elbow joint and move the forearm, consists of muscles forming the musculature of which body bone?
Humerus
The muscles forming the musculature of the humerus arise primarily from which bone and insert in which subsequent set of bones?
Arise from the humerus and insert in forearm bones.
The muscles forming the musculature of the humerus are responsible for what 4 body movements?
1. Flexion
2. Extension
3. Pronation
4. Supination
The group of muscles forming the musculature of the forearm, for the most part, insert where and produce movements where?
Insert on the digits and produce movements of the hands and fingers.
Primary action of the pectoralis minor?
Pull scapula down and forward
Origin and insertion of pectoralis minor?
Origin: anterior surface of ribs 3-5
Insertion: coracoid process of scapula
Main action of serratus anterior?
Play role in push or punch of arm
2 main actions of trapezius?
1. Stabilize scapula
2. Shrug shoulders
Origin and 3 insertions of trapezius?
Origin: Occipital bone
Insertion: Acromion of scapula, spine of scapula, lateral clavicle
2 functions of rhomboid?
1. Stabilize scapula
2. Retract shoulders back
3 main actions of the pectoralis major?
1. Flex humerus
2. Adduct humerus
3. Medially rotate humerus
3 origins and insertion of pectoralis major?
Origins: clavicle, sternum, costal cartilages 1-6
Insertion: greater tubercle of humerus
3 main actions of the latissimus dorsi?
1. Extend humerus
2. Adduct humerus
3. Medially rotate humerus
Origin and insertion of latissimus dorsi?
Origins: ribs 9-12
Insertion: Intertubercular sulcus of humerus
3 main actions of the teres major?
1. Extend humerus
2. Adduct humerus
3. Medially rotate humerus
Main action of the deltoid?
Abduct humerus
Origin and insertion of deltoid?
Origins: Acromion of scapula
Insertion: Deltoid tuberosity of humerus
Main action of infraspinatus?
Laterally rotate humerus
Main action of supraspinatus?
Abduct humerus
Main action of teres minor?
laterally rotate humerus
Main action of subscapularis?
Medially rotate humerus
Main action of biceps brachii?
Flex elbow
2 origins and insertions of biceps brachii?
Origins: Coracoid process (short) and intertubercular sulcus humerus (long)
Insertion: radial tuberosity
Main action of brachialis?
flex elbow
Main action of brachioradialis?
flex elbow
Main action of triceps brachii?
Extend elbow
Origin and insertion of triceps brachii?
Origins: Posterior shaft humerus
Insertion: olecranon process of ulna
Main action of pronator teres?
Pronate forearm
2 main actions of flexor carpi radialis?
1. Flex wrist
2. Abduct hand
Main action of palmaris longus?
Tense skin of palm
2 main actions of flexor carpi ulnaris?
1. Flex wrist
2. Adduct hand
2 main actions of extensor carpi radialis longus?
1. extend wrist
2. abduct hand
2 main actions of extensor carpi radialis brevis?
1. extend wrist
2. abduct hand
Main action of extensor digitorum?
Extend fingers
Origin and insertion of extensor digitorum?
Origin: Lateral epicondyle of humerus
Insertion: Distal phalanges of fingers 2-5
Main action of extensor digiti minimi?
Extend finger V
2 main actions of extensor carpi ulnaris?
1. Extend wrist
2. Adduct hand
Identify the missing features.
Identify the missing features.
Identify the missing features.
