Muscles: Group 2 Flashcards
List the thoracic muscles that move the pectoral girdle.
Anterior Muscles
- Serratus anterior
- Pectoralis minor
Posterior
- Rhomboid minor
- Rhomboid major
- Trapezius
Name the origin, insertion, and action of the following muscle: Serratus anterior
Origin: upper ribs
Insertion: medial boarder of scapula
Action: rotation of scapula
Name the origin, insertion, and action of the following muscle: Pectoralis minor
Origin: upper ribs
Insertion: medial boarder of scapula
Action: depresses scapula
Name the origin, insertion, and action of the following muscle: Rhomboid minor
Origin: spinous process of C7-T1
Insertion: medial boarder of scapula
Action: adducts scapula
Name the origin, insertion, and action of the following muscle: Rhomboid major
Origin: spines of thoracic vertebrae
Insertion: medial boarder of scapula
Action: adducts scapula
Name the origin, insertion, and action of the following muscle: Trapezius
Origin: occipital bone; spinous process of C7-T12
Insertion: clavicle; acromion process and spine of scapula
Action: elevate, rotate, retract, and depress scapula
List the muscles that move the glenohumeral Joint/Arm
Axial Skeleton
- Latissimus dorsi
- Pectoralis major
Scapula
- Coracobrachialis
- Deltoid
Rotator cuff
- Teres minor
- Infraspinatus
- Supraspinatus
Name the origin, insertion, and action of the following muscle: Latissiumus dorsi
Origin: spinous process T7-T12, ribs 8-12
Insertion: intertubercular groove of humerus
Action:adducts and medially rotates humerus
Name the origin, insertion, and action of the following muscle: Pectoralis major
Origin: sternum and clavicle
Insertion: intertubercular groove of humerus
Action: flexes, adducts, and medially rotates humerus
Name the origin, insertion, and action of the following muscle: Coracobrachialis
Origin: coracoid process of scapula
Insertion: shaft of humerus
Action: flexes and adducts humerus
Name the origin, insertion, and action of the following muscle: Deltoid
Origin: acromion and spine of scapula, clavicle
Insertion: deltoid tuberosity of humerus
Action: abducts, flexes, and extends arm
Name the origin, insertion, and action of the following muscle: Teres minor
Origin: lateral boarder of scapula
Insertion: greater tubercle
Action: adducts and laterally rotates arm
Name the origin, insertion, and action of the following muscle: Infraspinatus
Origin: infraspinatus fossa
Insertion: greater tubercle
Action: adducts and laterally rotates humerus
Name the origin, insertion, and action of the following muscle: Supraspinatus
Origin: suprasoinatus fossa
Insertion: greater tubercle
Action: abducts humerus
List the muscles that move the forearm.
Flexors (anterior)
- Brachioradialis
- Brachialis
- Biceps brachii, short head
- Biceps brachii, long head
Extensors (posterior)
- Triceps brachii, medial head
- Triceps brachii, lateral head
- Triceps brachii, long head
Name the origin, insertion, and action of the following muscle: Brachioradialis
Origin: supracondylar ridge of humerus
Insertion: styloid process of radius
Action: flexes forearm
Name the origin, insertion, and action of the following muscle: Brachialis
Origin: shaft of humerus
Insertion: tuberosity and coronoid process of ulna
Action: flexes forearm
Name the origin, insertion, and action of the following muscle: Biceps brachii, short head
Origin: coracoid process of scapula
Insertion: radial tuberosity
Action: flexes forearm
Name the origin, insertion, and action of the following muscle: Biceps brachii, long head
Origin: supraglenoid tubercle of scapula
Insertion: radial tuberosity
Action: flexes forearm and arm
Name the origin, insertion, and action of the following muscle: Triceps brachii, medial head
Origin: posterior humerus (distal)
Insertion: olecranon of ulna
Action: extends forearm
Name the origin, insertion, and action of the following muscle: Triceps brachii, lateral head
Origin: posterior humerus (proximal)
Insertion: olecranon of ulna
Action: extends forearm
Name the origin, insertion, and action of the following muscle: Triceps brachii, long head
Origin: infraglenoid tubercle of scapula
Insertion: olecranon of ulna
Action: extends forearm
List the forearm muscles that move the wrist joint, hand, and fingers.
Flexors (anterior)
- Flexor digitorum superficialis
- Pronator teres
- Flexor carpi radialis
- Palmaris longus
- Flexor carpi ulnaris
Extensors (posterior)
- extensor digitorum
- extensor carpi ulnaris
Name the origin, insertion, and action of the following muscle: Flexor digitorum superficialis
Origin: medial epicondyle of humerus and coronoid process of ulna
Insertion: middle phalanges (2-5)
Action: flexes wrists and fingers
