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Anatomy Muscles > Upper Arm > Flashcards

Upper Arm Flashcards

1
Q

How many compartments of upper arm?

A

1.Anterior
2. Posterior

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2
Q

Name the muscles of upper arm?

A

Anterior

Biceps brachii
Chorachobrachialis
Brachialis
(Bas Car Bhai)

Posterior
Tricep Brachii

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3
Q

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

A

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

  1. Short head
    Origin:
    Coracoid process of scapula

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

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4
Q

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

A

Bicipital aponeurosis (expansion of biceps brachii tendon)

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5
Q

Action of biceps brachii?

A
  1. Flexor of elbow joint
  2. Supinator of forearm
  3. Weak flexor of shoulder joint
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6
Q

Biceps brachii is innervated by?

A

Musculocutaneous nerve
(Branch of the brachial plexus)

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7
Q

Origin of coracobrachialis?

A

Coracoid process of scapula

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8
Q

Insertion of coracobrachialis?

A

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

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9
Q

Action of coracobrachilalis?

A

Flexes arm
Weak adductor

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10
Q

Innervation of coracobrachialis?

A

Musculocutaneous nerve

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11
Q

Location of brachialis in terms of biceps brachii

A

Behind biceps brachii

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12
Q

Origin of brachialis?

A

Front of the lower half of the humerus

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13
Q

Insertion of brachialis?

A

Coronoid process of ulna and the ulnar tuberosity

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14
Q

Innervation of brachialis?

A

Musculocutaneous nerve

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15
Q

How many heads of triceps brachii? Their origin points?

A

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)

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16
Q

Which of the 3 heads of tricep is the smallest?

A

Medial head

17
Q

Insertion of triceps?

A

Olecrannon of ulna

18
Q

Action of tricpes?

A

Extensor of the elbow joint

19
Q

Innervation of triceps brachii?

A

Radial nerve

20
Q

Innervation of muscles of upper arm?

A

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

Radial nerve
Triceps brachii

21
Q

smaller muscle of posterior compartment other than triceps?

A

Anconeus muscle

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

22
Q

Origin of anconeus muscle?
Insertion?

A

Origin:
Lateral epicondyl of humerus

Insertion:
Olecrannon of ulna

23
Q

Function of anconeus?

A

Extension of forearm

24
Q

Innervation of anconeus?

A

Radial nerve

25
Q

What are anabolic steroids?

A

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!!!

26
Q

Difference between anabolic steroids and corticosteroids?

A

Corticosteroids -
Produced naturally in body
Reduce inflammation
Regulate immune response

Anabolic steroids -
Synthetic variant of male harmone testosterone
Promote muscle growth and athletic performance

27
Q

Arterial supply to the anterior compartment of the upper arm?

A

Branches of Brachial Artery

28
Q

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

A

Biceps brachii

Long head- supraglenoid tubercle of scapula
Short head- coracoid process of scapula

Inserts :
Radial tuberoisty

29
Q

Tendon of biceps brachii forms?and inserts into?

A

Bicipital aponeurosis

Insertion:
Deep fascia of anterior forearm

30
Q

What part forms roof of cubital fossa?

A

Bicipital aponeurosis of tendon of biceps brachii (bicep tendon)

31
Q

Choracobrachialis lies in terms of biceps brachii?

A

Deep to it

32
Q

Which muscle forms floor of cubital fossa?

A

Brachialis

33
Q

What is the clinical relevance of muscles of upper arm?

A

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

34
Q

What happens in rupture of biceps tendon?

A

A bulge is produced on flexing the elbow-
Popeye Sign

35
Q

Which is the head of triceps lies the deepest?

A

Medial head

36
Q

Arterial supply to the posterior compartment of upper arm?

A

Profunda brachii artery

37
Q

arterial supply to anterior and posterior compartment of upper arm?

A

Anterior- Brachial Artery
Posterior- Profunda Brachii Artery

Anatomy Muscles (8 decks)

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