Ant209 Brachium & Cubital Fossa

Front 1

Back 1

Front 2

Back 2

Front 3

Back 3

Front 4

the anterior compartment of the arm houses mainly what type of muscle and what innervation?

Back 4

the anterior compartment has preaxial muscles, indicating flexors and adductors, and the main innervation is done by C6 spinal nerve, all from the musculocutaneous.

Front 5

What are the muscles in the anterior compartment of the arm?

Back 5

Biceps Brachii
Brachialis
Coracobrachialis

Front 6

the posterior compartment of the arm houses mainly what type of muscle and what innervation?

Back 6

the posterior compartment houses postaxial muscles which indicated ABductor and extensor muscles, and the main innervation is from C7, both from the radial nerve.

Front 7

What are the muscles in the posterior compartment of the arm?

Back 7

Triceps brachii
Anconeus

Front 8

This picture demonstrates the relationship between muscle compartments and their main innervations using a preaxial/postaxial categorization.
Name the nerve for each muscle group and its main spinal nerve contribution.

Back 8

Front 9

What pierces the coracobrachialis muscle?
What is the coracobrachialis muscle innervated by?

Back 9

Musculocutaneous - C6

Front 10

what do the biceps do when the elbow is flexed?

Back 10

when supinated,flex elbow,
when pronated, it becomes the most powerful supinator

Front 11

What do the biceps do when the arm is extended?

Back 11

simple forarm flexor

Front 12

what is the most powerful forearm flexor?

Back 12

brachialis

Front 13

what does the coracobrachialis do?

Back 13

help flex the arm, adducts the arm, major stabilizer, (so humerus doesnt fall out)

Front 14

reflex hammer on the opposite side of the elbow tests what spinal nerve?

Back 14

C6, of the musculocutaneous

Front 15

what are the main actions of the triceps brachii?

Back 15

Main Actions
Forearm extensor
Can also adduct the arm
Long head resists humoral dislocation

Front 16

What abducts the ulna during pronation?

Back 16

anconeus

Front 17

Where is the anconeus?

Back 17

Origin – Lateral epicondyle of humerus
Insertion – Lateral surface of olecranon and superior aspect of posterior ulna

Front 18

What does the anconeus do?

Back 18

Slight forearm extensor
Elbow stabilizer
Abducts ulna during pronation

Front 19

WHat would an injury to the radial nerve in the radial groove cause?

Back 19

Injury to the radial nerve in the radial groove results in partial triceps paralysis because only the medial head is affected. However, the extensor muscles supplied by the nerve distally will be paralyzed.
This effect is seen clinically as “wrist drop” because of the unopposed tonus of the flexor muscles.

Front 20

What is "wrist drop" a sign of?

Back 20

Injury to the radial nerve in the radial groove results in partial triceps paralysis because only the medial head is affected. However, the extensor muscles supplied by the nerve distally will be paralyzed.

Front 21

Back 21

Front 22

Back 22

Front 23

Both deep and superficial veins ultimately drain into the ____ vein near the root of the neck

Back 23

subclavian

Front 24

Venipuncture is usually accomplished in the _____ _____ vein overlying the cubital fossa

Back 24

median cubital

Front 25

Back 25

Front 26

Back 26

Front 27

The Trapezius muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 27

1.) Elevates shoulder/arm, fixes scapula 2.) Spinal Accesory 3.) CN XI, C3, C4

Front 28

The Diaphragm muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 28

1.) Inspiration 2.) Phrenic 3.) C345

Front 29

The Rhomboids muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 29

1.) Draw scapula up and in. 2.) Dorsal Scapular 3.) C456

Front 30

The Levator Scapulae muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 30

1.) Elevates scapula 2.) Dorsal Scapular 3.) C345

Front 31

The Serratus Anterior muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 31

1.) Fixes scapula on arm raise (part of winged scapula if cut) 2.) Long thoracic 3.) C567

Front 32

The Pectoralis major (clavicular head) muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 32

1.) Pulls shoulder forward 2.) Lateral Pectoral 3.) C56

Front 33

The Pectoralis major (sternal head) muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 33

1.) Adducts and medially rotates arm 2.) Medial pectoral 3.) C678,T1

Front 34

The Pectoralis minor muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 34

1.) Depresses scapula and pulls shoulder forward 2.) Medial pectoral 3.) C678

Front 35

The Supraspinatus muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 35

1.) Abducts humerus from 0 deg to 15 deg. 2.) Suprascapular 3.) C56

Front 36

The Infraspinatus muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 36

1.) Externally rotates humerus 2.) Suprascapular 3.) C56

Front 37

The Subscapularis muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 37

1.) Internally rotates humerus 2.) Subscapular 3.) C56

Front 38

The Teres Major muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 38

1.) Adducts and internally rotates humerus 2.) Subscapular 3.) C567

Front 39

The Lat Dorsi muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 39

1.) Adducts and internally rotates humerus 2.) Thoracodorsal 3.) C678

Front 40

The Teres minor muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 40

1.) Adducts and internally rotates humerus 2.) Axillary 3.) C56

Front 41

The Deltoid muscle 1.) has what function? 2.) is innervated by which nerve? And 3.) Has which roots?

Back 41

1.) Abducts humerus beyond 15 deg 2.) Axillary 3.) C56

Front 42

The Axillary nerve feeds which muscle(s)?

Back 42

Teres minor and Deltoid

Front 43

The Dorsal Scapular nerve feeds which muscle(s)?

Back 43

Rhomboids and Levator Scapulae

Front 44

The Lateral Pectoral nerve feeds which muscle(s)?

Back 44

Pectoralis major (clavicular head)

Front 45

The Long thoracic nerve feeds which muscle(s)?

Back 45

Serratus Anterior

Front 46

The Medial pectoral nerve feeds which muscle(s)?

Back 46

Pectoralis major (sternal head) and Pectoralis minor

Front 47

The Phrenic nerve feeds which muscle(s)?

Back 47

Diaphragm

Front 48

The Spinal Accesory nerve feeds which muscle(s)?

Back 48

Trapezius

Front 49

The Subscapular nerve feeds which muscle(s)?

Back 49

Subscapularis and Teres Major

Front 50

The Suprascapular nerve feeds which muscle(s)?

Back 50

Supraspinatus and Infraspinatus

Front 51

The Thoracodorsal nerve feeds which muscle(s)?

Back 51

Lat Dorsi