Muscles I - Surface Shoulder

Question 1

*SCM

Answer 1

O: Manubrium + Clavicle
I: Mastoid Process
Inn: Accessory Nerve (Root C2/3)
A: Uni Lateral - Flexion/rotation of neck. Bi Lat: Neck Flexion

Question 2

*Scalenes (Ant, Mid, Post)

Answer 2

O: C2-7 transverse processes
I: Ant - 1st Rib tubercle, Mid - 2nd Rib, Post - 1st Rib ext border
Inn: Spinal Accessory
A: Elevate ribs
Note: Phrenic nerve passes over Ant Scalene

Question 3

*Trapezius

Answer 3

O: Nucheal Line of Occipital bone, Ligamentum Nuchae +Spinous process C7-T12
I: Clavicle, Acromion, medial Spine of scapula
Inn: Spinal Accessory
A: Elevate, Depress, Retract, Rotation

Question 4

*Levator Scapulae

Answer 4

O: Transverse Processes C1-C4
I: Superior Medial Border of Scapula
Inn: Dorsal Scapular + C3/4
A: Elevate scap and rotation

Question 5

*Pectoralis Major

Answer 5

O: Clavicle and Sternum
I: Intertubecular Sulcus of Humerus
Inn: Lateral + Medial Pectoral Nerves
A: Add & Medial Rot of Humerus

Question 6

*Pectoralis Minor

Answer 6

O: 3-5 Rib
I: Coracoid Process
Inn: Medial Pectoral Nerve
A: Stabilize scap, inspiration

Question 7

*subclavius

Answer 7

O: 1st Rib / Costal Cartilage
I: Inferior Clavicle
Inn: nerve to subclavius (C5,6)
A: Anchors & Depresses clavicle

Question 8

*Serratus Anterior

Answer 8

O: Ribs 1-8
I: Medial Border of Scapula
Inn: Long Thoracic Nerve
A: Protracts scapula, holds scap against Thor wall, Rot Scap

Question 9

*Latissimus Dorsi

Answer 9

O: Spinous Process T6-12, Illiac crest + inferior ribs
I: Intertubecular sulcus of humerus
Inn: Thoracodorsal (C6-8)
A: Extend, add, medial rot humerus

Question 10

*Rhomboids Major/Minor

Answer 10

O: Maj - Spinous Process T2-5/ Min- C7-T1
I: Medial Border of Scapula
Inn: Dorsal Scapular Nerve
A: Retract scap, rotation, Fix scap to thor wall.