Muscles of the Arm and Shoulder 1 - Week 10

Question 1

SUBSCAPULARIS

Origin:
Insertion:
Action:

Answer 1

Origin: SCAPULA

Insertion: LESSER TUBERCLE OF HUMERUS

Action: MEDIAL (INTERNAL) ROTATION OF SHOULDER

Nerve: upper and lower subscapular nerves

Question 2

SERRATUS ANTERIOR

Origin:
Insertion:
Action:

Answer 2

Origin: RIBS 1-8 OR 1-9

Insertion: MEDIAL/VERTEBRAL BORDER

Action: PROTRACS (PROT) SCAPULA

Nerve: long thoracic nerve

Question 3

TRICEPS BRACHII

Origin:
Insertion:
Action:
Nerve:

Answer 3

Origin:
LONGHEAD - INFRAGLENOID TUBERCLE OF SCAPULA

LATERAL HEAD - PROXIMAL 1/2 , POSTERIORLATERAL HUMERUS

MEDIAL HEAD - DISTAL 1/2 POSTERIOR SHAFT OF HUMERUS

Insertion: OLECRANON PROCESS OF ULNA

Action: E FOREARM AT ELBOW

Nerve: RADIAL NERVE

Question 4

ANCONEUS

Origin:
Insertion:
Action:
Nerve:

Answer 4

Origin: LATERAL EPICONDYLE OF HUMERUS

Insertion: OLECRANON OF ULNA

Action: E OF FOREARM AT ELBOW

Nerve: RADIAL NERVE

Question 5

SUPRASPINATUS

Origin:
Insertion:
Action:

Answer 5

Origin: SUPRASPINOUS FOSSA OF SCAPULA

Insertion: GREATER TUBERCLE OF HUMERUS

Action: ABD AT SHOULDER

Nerve: suprascapular nerve

Question 6

INFRASPINATUS

Origin:
Insertion:
Action:

Answer 6

Origin: INFRASPINOUS FOSSA OF SCAPULA

Insertion: GREATER TUBERCLE OF HUMERUS

Action: LR OF SHOULDER

Nerve: scapular nerve

Question 7

TERES MINOR

Origin:
Insertion:
Action:

Answer 7

Origin: LATERAL/AXILLARY BORDER OF SCAPULA

Insertion: GREATER TUBERCLE OF HUMERUS

Action: LR OF ARM AT SHOULDER

Nerve: axillary nerve

Question 8

TERES MAJOR

Origin:
Insertion:
Action:

Answer 8

Origin: INTERIOR ANGLE AND INFERIOR 1/3 OF LATERAL/AXILLARY BORDER OF SCAPULA

Insertion: MEDIAL LIP OF THE INTERTUBERCULAR SULCUS OF HUMERUS

Action: E, ADD, AND MR OF ARM AT SHOULDER

Nerve: lower scapular

Question 9

LATISSIMUS DORSI

Origin:
Insertion:
Action:

Answer 9

Origin: T6-T12 (SP’S),
POSTERIOR 1/3 OF ILIAC CREST,
INFERIOR ANGLE OF SCAPULA

Insertion: MEDIAL LIP OF THE INTERTUBERCULAR SULUCS OF HUMERUS

Action: E, ADD, AND MR OF ARM AT SHOULDER

Nerve: thoracodorsal nerve

Question 10

BRACHIALIS

Origin:
Insertion:
Action:
Nerve:

Answer 10

Origin: DISTAL 1/2 OF THE ANTERIOR SHAFT OF HUMERUS

Insertion: TUBEROSITY OF ULNA

Action: F OF FOREARM AT ELBOW

Nerve: MUSCULOCUTANEOUS NERV

Question 11

PRONATOR TERES

Origin:
Insertion:
Action:
Nerve:

Answer 11

Origin: MEDIAL EPICONDYLE OF HUMERUS

Insertion: MIDDLE 1/3 OF ANTEROLATERAL RADIUS

Action: PRON OF RADIUS, F OF FOREARM AT ELBOW

Nerve: MEDIAN NERVE

Question 12

BRACHIORADIALIS

Origin:
Insertion:
Action:
Nerve:

Answer 12

Origin: LATERAL SUPRACONDYLAR RIDGE OF HUMERUS

Insertion: STYLOID PROCESS OF RADIUS

Action: F AT ELBOW; ASSISTS SUP AND PRON OF RADIUS

Nerve: RADIAL NERVE

Question 13

BICEPS BRACHII

Origin:
Insertion:
Action:
Nerve:

Answer 13

Origin:
SHORTHEAD - CORACOID PROCESS OF SCAPULA

LONG HEAD - SUPRAGLENOID TUBERCLE OF SCAPULA

Insertion: RADIAL TERBEROSITY; BICIPITAL APONEUROSIS

Action: F AT THE ELBOW; SUP AT RADIOULNAR JOINTS; ASSISTS F AT SHOULDER

Nerve: MUSCULOCUTANEOUS NERVE