Test #2: Muscle Actions of the Upper Extremity & Axial Skeleton Flashcards
How many joints in the upper extremity and axial skeleton?
6 joints
What are the 6 joints of the upper extremity and axial skeleton?
- Wrist; 2. Elbow; 3. Shoulder; 4. Scapula; 5. Neck; and 6. Waist
How movements possible at the wrist joint?
4 movements
What are the 4 movements possible at the wrist joint?
- Flexion; 2. Extension; 3. Ulnar Deviation; and 4. Radial Deviation
What body part is moved at the wrist joint?
The hand
How many muscles create flexion of the hand at the wrist?
1 muscle group
What muscle group creates flexion of the hand at the wrist?
- The Flexor Group
Flexor Group
GL: Anterior, Forearm
O: Medial epicondyle of the humerus (Common Flexor Tendon)
I: Distal end of phalanges
How many actions does the flexor group perform?
2 actions
What 2 actions does the flexor group perform?
- Flexion of the hand at the wrist
2. Flexion of the phalanges
How do you palpate the flexor group?
Trace from medial epicondyle down the anterior forearm to the distal end of the fingers.
TG pgs 141-142, 149, 152
How many muscles create extension of the hand at the wrist?
1 muscle group
What muscle group creates extension of the hand at the wrist?
- The Extensor Group
Extensor Group
GL: Posterior, Forearm
O: Lateral epicondyle of humerus (Common Extensor Tendon)
I: Distal end of phalanges
How many actions does the extensor group perform?
2 actions
What 2 actions does the extensor group perform?
- Extension of the hand at the wrist
2. Extension of the phalanges
How do you palpate the extensor group?
Trace from the lateral epicondyle down the posterior forearm to the distal end of the fingers.
TG pgs 135-136, 139, 151
How many muscles create ulnar deviation of the hand at the wrist?
2 muscle groups
What 2 muscle groups create ulnar deviation of the hand at the wrist?
The ulnar side flexors and extensors
How do you palpate the ulnar side flexors and extensors?
Grab and trace along the ulnar side posterior and anterior forearm from the elbow to the distal end of the fingers.
How many muscles create radial deviation of the hand at the wrist?
2 muscle groups
What 2 muscle groups create radial deviation of the hand at the wrist?
The radius side flexors and extensors
How do you palpate the radius side flexors and extensors?
Grab and trace along the radius side posterior and anterior forearm from the elbow to the distal end of the fingers.
How many movements possible at the elbow joint?
4 movements
What are the 4 movements possible at the elbow joint?
- Flexion; 2. Extension; 3. Pronation; and 4. Supination
What body part is moved at the elbow joint?
The forearm
How many muscles create flexion of the forearm at the elbow?
4 muscles
What 4 muscles create flexion of the forearm at the elbow?
- Biceps Brachii; 2. Brachioradialis; 3. Brachialis; and 4. Pronator Teres
Biceps Brachii*
GL: Anterior, Arm, Superficial
O: 1) Short Head: Coracoid process of the Scapula; 2) Long Head: Supraglenoid tubercle of the Scapula
I: Radial tuberosity and Aponeurosis of the Biceps Brachii to proximal Ulna
How many actions does Biceps Brachii perform?
3 actions
What 3 actions does Biceps Brachii perform?
1-2. Flexion and supination of the forearm at the elbow
3. Flexion of the arm at the shoulder (short head)
How do you palpate Biceps Brachii?
Trace from the coracoid process and acromion down the anterior arm to just distal of the elbow crease on the radius side.
TG pg 95
Brachioradialis*
GL: Anterior/Lateral, Forearm, Superficial
O: Lateral supracondylar ridge of the Humerus
I: Styloid process of the Radius
How many actions does Brachioradialis perform?
1 action
What action does does Brachioradialis perform?
- Flexion of the forearm at the elbow
How do you palpate Brachioradialis?
Trace just distal of the deltoid tuberosity, down over the lateral elbow to the radial wrist bone.
TG pg 133
Brachialis*
GL: Anterior, Arm, Deep
O: Distal 1/2 of the anterior surface of the Humerus
I: Coronoid process and tuberosity of the Ulna
How many actions does Brachialis perform?
1 action
What action does does Brachialis perform?
- Flexion of the forearm at the elbow
How do you palpate Brachialis?
Cover the anterior distal 1/2 of the humerus with a hand; fingers pointing on ulnar side.
TG pg 132
Pronator Teres*
GL: Anterior, Forearm, Superficial
O: Medial epicondyle of the Humerus (common flexor tendon)
I: Middle of the Radius
How many actions does Pronator Teres perform?
2 actions
What 2 actions does Pronator Teres perform?
1-2. Pronation and flexion of the forearm at the elbow.
How do you palpate Pronator Teres?
In the handshake position, use left hand with fingers at medial epicondyle on an angle so that palm lands on the middle of the radius.
TG pg 146
How many muscles create extension of the forearm at the elbow?
1 muscle
What muscle creates extension of the forearm at the elbow?
- Triceps Brachii
Triceps Brachii*
GL: Posterior, Arm, Superficial
O: 1) Long head: Infraglenoid tubercle of the Scapula; 2) Lateral head: Posterior, proximal half of the Humerus; 3) Medial head: Posterior, distal half of the Humerus
I: Olecranon process of the Ulna
How many actions does Triceps Brachii perform?
2 actions
What 2 actions does Triceps Brachii perform?
- Extension of the forearm at the elbow
2. Extension of the arm at the shoulder (long head)
How do you palpate Triceps Brachii?
Trace from the most superior medial border of the scapula down the posterior arm to the elbow.
TG pg 97
How many muscles create pronation of the forearm at the elbow?
1 muscle
What muscle creates pronation of the forearm at the elbow?
- Pronator Teres
How many muscles create supination of the forearm at the elbow?
2 muscles
What 2 muscles create supination of the forearm at the elbow?
- Supinator; and 2. Biceps Brachii
Supinator
GL: POSTERIOR, LATERAL, FOREARM, DEEP
O: Lateral epicondyle of the Humerus and posterior border of the Ulna
I: Proximal 1/3 of the Radius
How many actions does Supinator perform?
1 action
What action does Supinator perform?
- Supination of the forearm at the elbow
How do you palpate Supinator?
Trace from the lateral epicondyle and elbow laterally to the anterior proximal radius.
TG pg 147
How many movements possible at the shoulder joint?
6 movements
What are the 6 movements possible at the shoulder joint?
- Flexion; 2. Extension; 3. ABduction; 4. ADduction; 5. Medial Rotation; and 6. Lateral Rotation
What body part is moved at the shoulder joint?
The arm
How many muscles create flexion of the arm at the shoulder?
3 muscles
What 3 muscles create flexion of the arm at the shoulder?
- Pectoralis Major; 2. Anterior Deltoid; and 3. Biceps Brachii (short head)
Pectoralis Major*
GL: Anterior, Chest, Superficial
O: 1) Clavicular head: Medial 1/2 of the clavicle; 2) Sternocostal head: Sternum, superior 6 costal cartilages
I: Lateral lip of bicipital (intertubercular) groove of humerus
How many actions does Pectoralis Major perform?
3 actions
What 3 actions does Pectoralis Major perform?
- Flexion of the arm at the shoulder (clavicular head)
2-3. ADduction and medial rotation of the arm at the shoulder (sternal head)
How do you palpate Pectoralis Major?
Trace the 2 fiber directions: 1) from medial 1/2 of clavicle and 2) from the sternum; both to the lateral lip of the bicipital groove.
TG pg 89
Deltoid*
GL: Lateral, Shoulder, Superficial
O: 1) Anterior: Lateral 1/3 of the Clavicle; 2) Middle: Acromion; 3) Posterior: Spine of the Scapula
I: Deltoid tuberosity of the Humerus
How many actions does Deltoid perform?
5 actions
What 5 actions does Deltoid perform?
1-2. Flexion and medial rotation of the arm at the shoulder (anterior deltoid)
3. ABduction of the arm at the shoulder (mid deltoid)
4-5. Extension and lateral rotation of the arm at the shoulder (posterior deltoid)
How do you palpate Deltoid?
Trace the outline of the entire deltoid with 2 fingers (posterior spine of scapula/anterior lateral 1/3 of clavicle) laterally to the deltoid tuberosity.
TG pg 67
How many muscles create extension of the arm at the shoulder?
4 muscles
What 4 muscles create extension of the arm at the shoulder?
- Latissimus Dorsi; 2. Teres Major; 3. Posterior Deltoid; and 4. Triceps Brachii
Latissimus Dorsi*
GL: Posterior, Back, Superficial
O: Spinous processes of T7-T12, thoracolumbar fascia, iliac crest and inferior 3 or 4 ribs
I: Floor of the bicipital (intertubercular) groove of the humerus
How many actions does Latissimus Dorsi perform?
3 actions
What 3 actions does Latissimus Dorsi perform?
1-3. Extension, medial rotation and aDduction of the arm at the shoulder
How do you palpate Latissimus Dorsi?
Use two hands to cover the muscle belly on the thoracolumbar region and trace up to the axilla anteriorly to the bicipital groove.
TG pg 71
Teres Major*
GL: Posterior, Axilla, Superficial
O: Inferior angle (lateral side of) and lower 1/2 of the lateral border of the Scapula
I: Medial lip of the bicipital groove of the Humerus
How many actions does Teres Major perform?
3 actions
What 3 actions does Teres Major perform?
1-3. Extension, medial rotation and aDduction of the arm at the shoulder
How do you palpate Teres Major?
Trace from the inferior lateral border of the scapula up to the axilla anteriorly to the bicipital groove.
TG pg 71
How many muscles create the posterior axillary fold?
2 muscles
What 2 muscles create the posterior axillary fold?
- Latissimus Dorsi; and 2. Teres Major