U.E. Muscles Actions, O's & I's (Class # 3) Flashcards
Anterior Forearm
Flexor Group
Muscles #21-26
TG pg. 140-146, 149, 152
ACB pg. 56-57
> Name the Action(s) of these muscles.
**Name the Common Origin of these muscles.
ACTION(S):
- Flexion of the wrist and fingers
**COMMON ORIGIN:
- MEDIAL Epicondyle of the Humerus.
**Although we aren’t required to study the O’s & I’s of each muscle, we must know their common origin.
Posterior Forearm
Extensor group
Muscles #11-18
TG pg. 135-138,151
ACB pg. 56
> Name the Action(s) of these muscles.
**Name the Common Origin of these muscles.
ACTION(S):
- Extension of the wrist and fingers
**COMMON ORIGIN:
LATERAL Epicondyle of the Humerus.
**Although we aren’t required to study the O’s & I’s of each muscle, we must know their common origin.
Anterior Arm
*Biceps Brachii
Muscle #8
TG pg. 95
ACB pg. 55
> Name the Origin(s), Insertion(s) and Action(s) of this muscle.
ORIGIN(S):
- Short Head: Coracoid Process of the Scapula
- Long Head: Supraglenoid tubercle of the Scapula
INSERTION(S):
- Radial tuberosity of the radius
- Proximal Ulna (by way of the bicipital aponeurosis)
ACTION(S):
1- Flexion of the forearm at the elbow
2- Supination of the forearm at the elbow
3- Flexion of the arm at the shoulder (short head)
Anterior Arm
Brachialis*
Muscle #7
TG pg. 132
ACB pg. 55
> Name the Origin(s), Insertion(s) and Action(s) of this muscle.
ORIGIN(S):
- Distal 1/2 of the anterior surface of the Humerus.
INSERTION(S):
- Proximal Ulna (Coronoid process and tuberosity of the Ulna)
ACTION(S):
- Flexion of the forearm at the elbow
Superficial layer of the Anterior Forearm
Brachioradialis*
Muscle #20
TG pg. 133
ACB pg. 55
> Name the Origin(s), Insertion(s) and Action(s) of this muscle.
ORIGIN(S):
- Lateral supracondylar ridge of the Humerus
INSERTION(S):
- Styloid process of the Radius
ACTION(S):
- Flexion of the forearm at the elbow
Scapula and posterior arm muscles
Triceps Brachii*
Muscle #6
TG pg. 97
ACB pg. 55
> Name the Origin(s), Insertion(s) and Action(s) of this muscle.
ORIGIN(S):
- Long Head:
Infranglenoid tubercle of the Scapula
- Lateral Head:
Posterior, proximal half of the humerus
- Medial Head:
Posterior, distal half of the Humerus
INSERTION(S):
- Olecranon process of the Ulna
ACTION(S):
1- Extension of the forearm at the elbow
2- Extension of the arm at the shoulder (long head only)
Anterior Forearm
Pronator Teres*
Muscle #29
TG pg. 146
ACB pg. 56
> Name the Origin(s), Insertion(s) and Action(s) of this muscle.
ORIGIN(S):
- Medial epicondyle of the Humerus (Common flexor tendon)
INSERTION(S):
- Middle of the Radius
ACTION(S):
1- Pronation of the forearm at the elbow
2- Flexion of the forearm at the elbow
Deep layer of the Posterior/Lateral Forearm
Supinator
Muscle #10
TG pg. 147
ACB pg.
> Name the Action(s) of this muscle.
ACTION(S):
- Supination of the forearm at the elbow
=================================
We are not responsible for O’s & I’s
(No asterix*)
> FYI, just for fun:
- Origins: Lateral epicondyle of the humerus, and supinator crest and supinator fossa of the ulna
- Insertion: Proximal third of the radius
Pectoral and Scapula muscle
Pectoralis Major*
Muscle #99
TG pg. 89
ACB pg. 54
> Name the Origin(s), Insertion(s) and Action(s) of this muscle.
ORIGIN(S):
> Clavicular Head:
1- Medial 1/2 of the Clavicle
> Sternocostal Head:
2- Sternum,
3- Superior 6 Costal cartilages
INSERTION(S):
- Lateral lip of the Bicipital (Intertubercular) groove of the Humerus
ACTION(S):
> Clavicular Head:
1- Flexion of the arm at the shoulder
> Sternocostal Head:
2- ADduction of arm at the shoulder-
3- Medial rotation of arm at the shoulder
Lateral Shoulder
Deltoid*
Muscle #9
TG pg. 67
ACB pg. 54
> Name the Origin(s), Insertion(s) and Action(s) of this muscle.
ORIGIN(S):
- Anterior: Lateral 1/3 of the Clavicle
- Middle: Acromion
- Posterior: Spine of the Scapula
INSERTION(S):
- Deltoid Tuberosity of the Humerus
ACTION(S):
Anterior:
1- Flexion of arm at the shoulder
2- Medial rotation of arm at the shoulder
Middle:
3- ABduction of arm at the shoulder
Posterior:
4- Extension of arm at the shoulder
5- Lateral rotation of arm at the shoulder
Pectoral and Scapula muscle
Latissimus Dorsi*
Muscle #97
TG pg. 71
ACB pg. 54
> Name the Origin(s), Insertion(s) and Action(s) of this muscle.
ORIGIN(S):
- Spinous processes of T7 - T12,
- Thoracolumbar fascia,
- Iliac crest, and
- inferior 3 or 4 ribs
INSERTION(S):
- Floor of the Bicipital (Intertubercular) groove of the Humerus
ACTION(S):
1- Extension of arm at the shoulder
2- Medial rotation of arm at the shoulder
3- ADduction of arm at the shoulder
Scapula and posterior arm muscles
Teres Major*
Muscle #5
TG pg. 71
ACB pg. 54
> Name the Origin(s), Insertion(s) and Action(s) of this muscle.
(Note: sometimes referred to as “lats’ little helper”, Teres Major has the same Actions as Latissimus Dorsi.)
ORIGIN(S):
- Lateral side of Inferior angle, and
- Lower half of the lateral border of the Scapula
INSERTION(S):
- Bicipital groove of the Humerus (medial lip)
ACTION(S):
1- Extension of arm at the shoulder
2- Medial rotation of arm at the shoulder
3- ADduction of arm at the shoulder
