Pectoral region/axioappendicular

Question 1

Posterior axioappendicular muscles

Answer 1

[all extrinsic muscles]
superficial =
superficial extrinsic muscles of back (trapezius and latissimus dorsi)
deep =
levator scapulae, rhomboid minor, and rhomboid major

Question 2

Anterior axioappendicular muscles

Answer 2

pectoralis major
pectoralis minor
subclavius
serratus anterior

Question 3

Attachments of pectoralis major

Answer 3

Proximal: anterior surface of medial half of clavicle / manubrium, anterior sternum, T1-T6 costal cartilages, external oblique aponeurosis
Distal: lateral lip of intertubercular sulcus of humerus

Question 4

Action of pectoralis major

Answer 4

adducts, medially rotates, flexes (clavicular), extends humerus at shoulder (sternocostal), depresses/protracts/inferiorly rotates scapula

Question 5

Blood supply of pectoralis major

Answer 5

pectoral branch of thoracoacromial artery

Question 6

Innervation of pectoralis major

Answer 6

lateral and medial pectoral nerves
clavicular head (C5, C6)
sternocostal head (C7, C8, T1)

Question 7

Attachments of pectoralis minor

Answer 7

Proximal: 3rd-5th ribs near costal cartilages
Distal: medial border and superior surface of coracoid process of scapula

Question 8

Actions of pectoralis minor

Answer 8

depresses, protracts, and inferiorly rotates scapula

Question 9

Blood supply of pectoralis minor

Answer 9

pectoral branch of thoracoacromial artery

Question 10

Innervation of pectoralis minor

Answer 10

medial pectoral nerve (C8, T1)

Question 11

Attachments of subclavius

Answer 11

Proximal: 1st rib and its costal cartilage
Distal: middle third of clavicle in subclavian groove

Question 12

Actions of subclavius

Answer 12

assists in stabilizing and depressing clavicle

Question 13

Blood supply of subclavius

Answer 13

clavicular branch of thoracoacromial artery

Question 14

Innervation of subclavius

Answer 14

nerve to the subclavius (C5, C6)

Question 15

Attachments of serratus anterior

Answer 15

Proximal: external surface of lateral parts of ribs 1-9
Distal: anterior surface of medial border of scapula

Question 16

Actions of serratus anterior

Answer 16

protracts, depresses, and superiorly rotates scapula

antagonized by rhomboids!

Question 17

Blood supply of serratus anterior

Answer 17

lateral thoracic artery, also a branch of thoracodorsal artery

Question 18

Innervation of serratus anterior

Answer 18

long thoracic nerve (C5, C6, C7)

Question 19

//Attachments of external obliques

Answer 19

Proximal: ribs 5-12
Distal: linea alba, pubic tubercle, and anterior half of iliac crest

Question 20

//Actions of external obliques

Answer 20

compresses and supports abdominal viscera

Question 21

//Innervation of external obliques

Answer 21

thoracoabdominal nerves (T7-T11) and subcostal nerve (T12)

Question 22

//Attachments of rectus abdominis

Answer 22

Proximal: pubic symphysis and crest
Distal: xiphoid process and 5th-7th costal cartilages

Question 23

//Actions of rectus abdominis

Answer 23

flexes trunk, compresses and supports abdominal viscera, and stabilizes pelvis

Question 24

//Innervation of rectus abdominis

Answer 24

thoracoabdominal nerves (T6-T12)