Thorax, Shoulder, Abdomen, Rotator Cuff

Question 1

*Deltoid
    Location
    Action
    Origin
    Insertion

Answer 1

Location. Prominent shoulder muscle
Action. Prime abductor of arm
Origin. Clavicle and scapula
Insertion. Deltoid tuberosity of the humerus

Question 2

External intercostal

Location

Answer 2

Runs downwards
11 pairs
Origin. Inferior boarders of above ribs
Insertion. Superior boarders of below ribs

Question 3

Internal intercostal

Location

Answer 3

Deep
Runs at 90 degrees to external intercostal
Origin. Superior boarders of one rib
Insertion. Inferior boarders of above ribs

Question 4

*Pectoralis major
   Location 
   Action
   Origin
   Insertion

Answer 4

Origin. Clavicle, sternum, rib cartilages
Insertion. Great or tubercle of the humerus
Action. Flexes arm and addicts it

Question 5

*Pectoralis minor
   Location
   Action
   Origin
   Insertion

Answer 5

Location. Directly beneath major
Action. Draws scapula forward and downward and adjust ribcage
Origin. Ribs
Insertion. Pectoral girdle

Question 6

*Trapezious
    Location
    Action
    Origin
    Insertion

Answer 6

Locations. Fibers run in many directions
Action. Head, neck, and shoulder movements
Origin. Spinous process of the thoracic vertebra
Insertion. Acromion process and spine of scapula

Question 7

*Latissimus dorsi
    Location
    Action
    Origin
    Insertion

Answer 7

Origin. fascia of the spines of the thoracic and lumbar vertebra
Insertion. Groove of humerus
Action. Prime mover of arm

Question 8

Shoulder
Subclavius
Action

Answer 8

Stabilizes clavicle part of pectoral girdle

Question 9

Shoulder
Levator scapulae
Action

Answer 9

Elevates the scapula

Question 10

Sternocleidomastoid

Action

Answer 10

One of prime movers of head

Helps stabilize pectoral girdle

Question 11

Rotator cuff
List muscles
“SITS”

Answer 11

Supraspinatus
Infraspinatus
Teres minor
Subscapularis

Question 12

Rhomboideus major

Action

Answer 12

Retracts the scapula and rotates it to depress the glenoid cavity

Question 13

Rhomboideus minor

Action

Answer 13

Retracts and rotates scapula

Fixes scapula to thoracic wall

Question 14

Abdomen
Reclusive abdominis
    Location
    Action
    Origin
    Insertion

Answer 14

Action. Depresses ribs and allows flexion at the waist
Origin. Pubis (public crest)
Insertion. Ribcage (cartilage of 5th to 7th ribs)

Question 15

Abdomen
External oblique
    Location 
    Action
    Origin
    Insertion

Answer 15

Action. Flexes and depresses Abdominal cavity
Origin. Lower ribs
Insertion. Midline of body (linea alba)
Fibers run downward
Largest of ab muscles

Question 16

Abdomen
Internal oblique
   Location
   Action
   Origin
   Insertion

Answer 16

Action. Similar to external obliques
Origin. Lower ribs
Insertion. Linea Alba
Fibers run upward 90 degrees to external obliques

Question 17

Abdomen
Transversus abdominis
    Location
    Action
    Origin
    Insertion

Answer 17

Action. Compress the abdominal wall
Origin. Fascia in the lumbar region and cartilage of last 6 ribs
Insertion. Linea Alba and pubic crest
Deepest of 4 muscles
Fibers run horizontally

Question 18

Serratus anterior

Action

Answer 18

Rotates and abducts scapula