Muscles of Arm and Shoulder 2.- Week 11

Question 1

RHOMBOID MINOR

Origin:
Insertion:
Action:

Answer 1

Origin: SPINOUS PROCESS of C7 and T1

Insertion: MEDIAL/VERTEBRAL BOARDER OF SCAPULA

Action: RETR OF SCAP;
ASSISTS ELEV OF SCAP

Nerve: dorsal scapular nerve

Question 2

RHOMBOID MAJOR

Origin:
Insertion:
Action:

Answer 2

Origin: SPINOUS PROCESS OF T2-T5

Insertion: MEDIAL/VERTEBRAL BOARDER OF SCAPULA

Action: RETR OF SCAPULA

Nerve: dorsal scapular

Question 3

LEVATOR SCAPULAE

Origin:
Insertion:
Action:

Answer 3

Origin: C1-C4 (TPs)

Insertion: MEDIAL/VERTEBRAL BOARDER OF SCAPULA (BETWEEN SUPERIOR ANGLE AND SUPERIOR ROOT OF SPINE)

Action: ELEV OF SCAPULA;
LF OF NECK

Nerve: cervical spine nerves (3, 4) and dorsal scapular nerve

Question 4

TRAPEZIUS

Origin:
Insertion:
Action:

Answer 4

Origin:OCCIPITAL BONE; C1-T12

Insertion: SUPERIOR SPINE AND ACROMION PROCESS OF SCAPULA;
LAT 1/3 FO SUPERIOR CLAVICLE

Action: ELEV, RETR, DEP OF SCAPULA;
ASSISTS E, LF, R (OPPOSITE SIDE) OF NECK

Nerve: accessory nerves (CN XI) and cervical spinal nerves (2-4)

Question 5

PECTORALIS MINOR

Origin:
Insertion:
Action:

Answer 5

Origin:RIBS 3-5 (ANTERIOR)

Insertion: CORACOID PROCESS OF SCAPULA

Action: DEP AND PROT OF SCAPULA

Nerve: medial pectoral, some lateral pectoral

Question 6

COROCO-BRACHIALIS

Origin:
Insertion:
Action:
Nerve:

Answer 6

Origin: CORACOID PROCESS OF SCAPULA

Insertion: MIDDLE SHAFT OF MEDIAL HUMERUS

Action: ASSISTS F AND ADD OF ARM AT SHOULDER

Nerve: MUSCULOCUTANEOUS NERVE

Question 7

PECTORALIS MAJOR

Origin:
Insertion:
Action:

Answer 7

Origin: MEDIAL HALF OF ANTERIOR CLAVICLE; STERNUM, COSTAL CARTILAGE

Insertion: INTERTUBERCULAER SULCUS (LAT. LIP) OF HUMERUS

Action: F, E, ADD, MR AT SHOULDER

Nerve: lat pectoral and medial pectoral nerves

Question 8

DELTOID

Origin:
Insertion:
Action:
Nerve:

Answer 8

Origin:LATERAL 1/3 OF CLAVICLE; ACROMION AND SPINE OF SCAPULA

Insertion: DELTOID TUBEROSITY OF HUMERUS

Action: ABD, F, E AT SHOULDER

Nerve: AXILLARY NERVE