Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

MBCHB MSS > Lecture 6: The Arm and the cubital fossa > Flashcards

Lecture 6: The Arm and the cubital fossa Flashcards

1
Q

what nerve innervates the deltoid?

A

axillary n

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is the origin and the insertion of the deltoid?

A

O- anatomical horseshoe
I-Deltoid tuberosity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is the main action of the middle deltoid fibers?

A

abducts arm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the main actions of the anterior deltoid fibers?

A

flex shoulder/humerus
internally rotate arm
abduct/adduct arm with posterior fibers( depending on shoulder position)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is the function of the posterior deltoid fibers?

A

-extend shoulder
-externally rotate the arm
-abduct/adduct arm( depending on shoulder position)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

where does teres major muscle originate and insert?

A

O-inferior angle and lateral border of scapula(posteriorly)
I- medial lip of intertubercular groove

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what nerve innervates teres major?

A

lower subscapular nerve
(Teres major is located below scapula= lower subscapular)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what are the actions of teres major?

A

internal rotation of the arm
adducts shoulder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what are the 3 heads of triceps brachii?

A

long, lateral, and medial

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what are the origins and insertions of the triceps brachii heads?

A

long head:
“O”-infra glenoid tubercle
Lateral and medial heads:
“O”-Back of humerus

“I” for all 3: olecranon of ulna

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what nerve innervates the triceps brachii?

A

radial nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the common group of muscles that radial nerve supplies?

A

extensor compartment of the arm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the blood vessel that supplies tricep brachii?

A

branches of profunda brachii artery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what nerve and artery pass through the quadrangular space?

A

axillary n
the posterior humeral circumflex artery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what nerve and artery pass through the triangular space?

A

a branch of circumflex scapular artery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

where do the radial nerve and the profunda brachii emerge ?

A

from behind the triangular interval

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what is the origin and insertion of brachialis?

A

O- anterior humerus and intermuscular septa
I-ulnar tuberosity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what nerve innervates the flexor compartment of the ARM?

A

musculocutaneous(anterior)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what nerve innervates the extensor compartment of the ARM?

A

radial( posterior)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

on what epicondyle does the common flexor tendon of the forearm attach?

A

medial epicondyle. Muscles go to the anterior flexor compartent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

on what epicondyle does the common extensor tendon of the forearm attach?

A

lateral. Muscles travel to the posterior extensor comp. of the forearm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

which muscle does not share the common tendon but belongs to the anterior/ flexor compartment of the forearm?

A

pronator teres

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

‘O’ and ‘I’ of long and short heads of biceps brachii

A

‘O’ long head: supraglenoid tubercle
‘O’ short head: coracoid
‘I’: radial tuberosity and bicipital aponeuroses(blends with deep fascia of the forearm)

24
Q

‘O’ and ‘I’ of brachialis

A

‘O’- anterior surface of distal humerus( including the intermuscular septa)
‘I’-tuberosity of ulna

25
Q

‘O’ and ‘I’ of coracorachialis

A

‘O’- coracoid
‘I’-medial side of humerus(opposite deltoid tuberosity)

26
Q

what muscle works the most when carrying heavy loads?

A

coracobrachialis

27
Q

what is the function of the long head of biceps brachii

A

holds the humerus in place. prevents dislocation
pushes the head of the humerus up against the glenoid fossa-> stabilisation

28
Q

what is this and what causes it?

A

“Popped muscle” due to rupture of long bicep head tendon

with age-develop bony spores on the sides of the tubercle->friction can cause the tendon to rupture

29
Q

what are the actions of the coracobrachialis?

A

adduction of the shoulder
flexion of shoulder

30
Q

what are the actions of brachialis?

A

main elbow flexor

31
Q

what are the actions of biceps brachii?

A

-supinator
-elbow flexor
-flexion of shoulder

32
Q

*EOM

A

1-cephalic vein
2-pectoralis major
3-musculocutaneous nerve
4-median nerve
5-brachial artery
6-basilic vein
7-ulnar nerve
8-arteria profunda brachii
9-radial nerve
10-biceps brachii
11/12-Corachobrachialis
13-humerus
14-medial head of triceps brachii
15-lateral head
16-triceps brachii
17-long head
18-deltoid

33
Q

*EOM

A

1-cephalic vein
2-musculocutaneous nerve
3-radial nerve
4-arteria profunda brachii
5-nerve to anconeus
6-middle collateral branch of arteria profunda brachii
7-ulnar nerve
8-superior ulnar collateral artery
9-medial cutaneous nerve of the forearm
10-basillic vein
11-median nerve
12-brachial artery
13-vena comitans
14-biceps brachii
15-brachialis
16-triceps brachii
17-humerus

34
Q

what are the actions of triceps brachii?

A

1- elbow extensor
2-shoulder adductor, shoulder extensor

35
Q

what are the most and least active parts of the triceps?

A

most- medial
least-long

36
Q

‘O’ and ‘I’ of triceps brachii

A

‘O’ long head: infra glenoid tubercle
‘O’ of lateral and medial heads: back of the humerus
‘I’ of all three: olecranon of ulna

37
Q
A

1-axillary nerve
2-posterior circumflex humeral artery
3-profunda brachii artery
4-radial nerve( in radial or spiral groove)
5-inferior lateral cutaneous nerve of the arm
6-lateral intermuscular septa
7-posterior cutaneous nerve of forearm
8-ulnar nerve(posterior to medial intermuscular septa)
9-medial epicondyle
10-
11-circumflex scapular artery

38
Q

what nerve can get damaged if the intramuscular injection into the shoulder is too low?

A

axillary nerve

39
Q

what nerve and artery are at risk of getting damaged if there is a midshaft fracture in a humerus?

A

radial n and profunda brachii artery( lie close to the bone)
most damaged to the forearm muscle

40
Q

what is the name of the muscle that is part of the forearm BUT contributes to elbow extension together with triceps?

A

anconeus

41
Q

what are the “Shunt muscles of arm”

A
42
Q
A
43
Q
A
44
Q
A
45
Q
A
46
Q

at what anatomical landmark does axillary artery become brachial artery?

A

inferior border of teres major

47
Q

what is the function of anastomosis?

A
48
Q

what are the boundaries of the cubital fossa?

A

superior: imaginary line between medial and lateral epicondyles
medial: lateral edge of pronator teres
lateral: medial boundary of brachioradialis
floor: brachialis tendon
roof: biceps tendon

49
Q

what nerve innervates the tricep brachii?

A

radial n

50
Q
A
51
Q
A
52
Q

why is the distal end of the humerus split into compartments?

A

some of the forearm muscles start originating at the humerus

forearm muscles need to be long to generate enough strength. Forearm muscles provide strength for the hands as the hands themselves cannot accommodate powerful muscles.

53
Q

what nerve/s innervates the anterior compartment of the forearm?

A

ulnar & median n

54
Q

what nerve/s innervates the posterior compartment of the forearm?

A

radial n

55
Q

what nerve innervates teres major?

A

lower subscapular n

56
Q
A

MBCHB MSS (28 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions