Muscles of the thorax and abdomen

Question 1

Synergist

Answer 1

The two muscles work together to carry out the function

Question 2

Antagonist

Answer 2

The two muscles that oppose one another

Question 3

3 primary functions of the Pectoralis major

Answer 3

-It flexes the whole arm at the shoulder joint
-It adducts (pulls) the whole arm at the shoulder joint
-Helps to rotate the arm immediately/internal rotation at the shoulder joint

Question 4

Synergist to the pectoralis major

Answer 4

Flexion of the forearm at the shoulder;
-Coraco brachialis
Adduction of the forearm;
-Coracobrachialis
-Latissimus dorsi
-Teres major
Medial rotation;
-Subscapularis
-Latissimus dorsi
-Teres major

Question 5

Antagonist to the pectoralis major

Answer 5

Flexion of the forearm at the shoulder;
-Teres major
-Latissimus dorsi
Abducts at the shoulder;
-Deltoid muscle
-Supraspinatus
Lateral rotation;
-Infraspinatus
-Teres minor

Question 6

External intercostals

Answer 6

-Help to elevate the ribs, they pull the ribs up
-Provide elevation of the ribs for inhalation

Question 7

Internal intercostals

Answer 7

-Depress the ribs, they pull the ribs down for a forced exhalation
-Antagonist with the external intercostals

Question 8

Serratus anterior

Answer 8

-Protracts the scapula along with the pectoralis minor

Question 9

Pectoralis minor

Answer 9

-Helps to protract the scapula
-Insertion point is the coraco process of the scapula
-Origin is ribs T2-5
-Synergist to serratus anterior which also protracts the scapula

Question 10

Subclavius

Answer 10

-Muscle underneath the clavicle
-Depresses the clavicle

Question 11

Abdominal muscles (superficial to deep)

Answer 11

-External oblique (most superficial)
-Internal oblique
-Rectus abdominis
-Transverse abdominis (most deep)

Question 12

External oblique

Answer 12

-Helps flex the vertebral column
-Compresses the contents of the abdomen to increase the intraabdominal pressure to assist in forced exhalation

Question 13

Internal oblique

Answer 13

-Carries out the same function as the external oblique
-Helps flex the vertebral column
-Compresses the contents of the abdomen to increase the intraabdominal pressure to assist in forced exhalation

Question 14

Rectus abdominis (6 pack muscles)

Answer 14

-Flexes the veterbral coulumn
-Compress the contents of the abdomen to increase intraabdominal pressure to assist in forced exhalation

Question 15

Transversus abdominis

Answer 15

-Compresses the contents of the abdomen to increase the intraabdominal pressure to assist in forced exhalation

Question 16

Linea alba

Answer 16

-It is a connective tissue in which some of these abdominal muscles are inserted onto