Upper Arm

Question 1

How many compartments of upper arm?

Answer 1

1.Anterior
2. Posterior

Question 2

Name the muscles of upper arm?

Answer 2

Anterior

Biceps brachii
Chorachobrachialis
Brachialis
(Bas Car Bhai)

Posterior
Tricep Brachii

Question 3

How many heads of biceps brachii? Their origin points?
Insertion of biceps brachii?

Answer 3

Two heads
1.long head
Origin:
Supraglenoid tubercle of scapula

2. Short head
   Origin:
   Coracoid process of scapula

Insertion
Both heads joint to form a tendon which inserts into:
Radial tuberosity

Question 4

Wide expansion of biceps brachii tendon which attaches to deep fascia of forearm?

Answer 4

Bicipital aponeurosis (expansion of biceps brachii tendon)

Question 5

Action of biceps brachii?

Answer 5

1. Flexor of elbow joint
2. Supinator of forearm
3. Weak flexor of shoulder joint

Question 6

Biceps brachii is innervated by?

Answer 6

Musculocutaneous nerve
(Branch of the brachial plexus)

Question 7

Origin of coracobrachialis?

Answer 7

Coracoid process of scapula

Question 8

Insertion of coracobrachialis?

Answer 8

Medial aspect of shaft of humerus
(At the level of deltoid Tuberosity)

Question 9

Action of coracobrachilalis?

Answer 9

Flexes arm
Weak adductor

Question 10

Innervation of coracobrachialis?

Answer 10

Musculocutaneous nerve

Question 11

Location of brachialis in terms of biceps brachii

Answer 11

Behind biceps brachii

Question 12

Origin of brachialis?

Answer 12

Front of the lower half of the humerus

Question 13

Insertion of brachialis?

Answer 13

Coronoid process of ulna and the ulnar tuberosity

Question 14

Innervation of brachialis?

Answer 14

Musculocutaneous nerve

Question 15

How many heads of triceps brachii? Their origin points?

Answer 15

3:

Long head
Origin: infraglenoid tubercle of scapula

Lateral head
Origin:
upper half of the posterior surface of shaft of humerus
(Superior to radial groove)

Medial head
Origin:
Lower half of the posterior surface of shaft of humerus
(Inferior to radial groove)

Question 16

Which of the 3 heads of tricep is the smallest?

Answer 16

Medial head

Question 17

Insertion of triceps?

Answer 17

Olecrannon of ulna

Question 18

Action of tricpes?

Answer 18

Extensor of the elbow joint

Question 19

Innervation of triceps brachii?

Answer 19

Radial nerve

Question 20

Innervation of muscles of upper arm?

Answer 20

Musculocutaneous nerve
1. Biceps brachii
2. Coracobrachialis
3. Brachialis

Radial nerve
Triceps brachii

Question 21

smaller muscle of posterior compartment other than triceps?

Answer 21

Anconeus muscle

(Both triceps and anconeus may be blended together so appear as one)

Question 22

Origin of anconeus muscle?
Insertion?

Answer 22

Origin:
Lateral epicondyl of humerus

Insertion:
Olecrannon of ulna

Question 23

Function of anconeus?

Answer 23

Extension of forearm

Question 24

Innervation of anconeus?

Answer 24

Radial nerve

Question 25

What are anabolic steroids?

Answer 25

Anabolic steroids are synthetic **variations of the male sex hormone testosterone** that are often used illegally to **increase muscle mass and strength**. Have side effects- Acne Hair loss Liver disease Kidney disease Heart disease Infertility Death!!!

Question 26

Difference between anabolic steroids and corticosteroids?

Answer 26

**Corticosteroids** - Produced naturally in body Reduce inflammation Regulate immune response **Anabolic steroids** - Synthetic variant of male harmone testosterone Promote muscle growth and athletic performance

Question 27

Arterial supply to the anterior compartment of the upper arm?

Answer 27

Branches of **Brachial Artery**

Question 28

Which of the of the muscles of upper arm has no attachment to humerus itself?

Answer 28

**Biceps brachii** *Long head*- **supra**glenoid tubercle of scapula *Short head*- coracoid process of scapula Inserts : Radial tuberoisty

Question 29

Tendon of biceps brachii forms?and inserts into?

Answer 29

Bicipital aponeurosis Insertion: Deep fascia of anterior forearm

Question 30

What part forms roof of cubital fossa?

Answer 30

Bicipital aponeurosis of tendon of biceps brachii (bicep tendon)

Question 31

Choracobrachialis lies in terms of biceps brachii?

Answer 31

Deep to it

Question 32

Which muscle forms floor of cubital fossa?

Answer 32

Brachialis

Question 33

What is the clinical relevance of muscles of upper arm?

Answer 33

A rupture of biceps tendon (**Long head** of biceps brachii)

Question 34

What happens in rupture of biceps tendon?

Answer 34

A bulge is produced on flexing the elbow- **Popeye Sign**

Question 35

Which is the head of triceps lies the deepest?

Answer 35

Medial head

Question 36

Arterial supply to the posterior compartment of upper arm?

Answer 36

Profunda brachii artery

Question 37

arterial supply to anterior and posterior compartment of upper arm?

Answer 37

Anterior- **Brachial Artery** Posterior- **Profunda Brachii Artery**