arm muscles Flashcards

1
Q

what is the name of the shoulder joint?

A

ball and socket joint

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2
Q

what is the type of teh shoulder joint?

A

synovial

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3
Q

what are the articulating bones of teh shoulder joint?

A

the heead of the humerus and teh glenoid cavity

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4
Q

describe the movement of teh shoulder joint

A

flexion,extension,hyperextension, medial and lateral rotation. adduction and abduction and circumduction

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5
Q

what muscles help strengthena nd stablize the shoulder joint?

A

muscles taht surrond the joint and the rotator cuff muscles

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6
Q

Fill in the blank
the cuff name is given to the of the (name the uscles)

A

tendon of the subscalpularis, infra and suprasoinatous, and teres minor

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7
Q

Fill in the blank
Cuff muscles are fused to the ? of the joint

A

Capsule

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8
Q

what sides do the cuff rotator muscles cover?

A

anteriorly, superiorly and posteriorly

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9
Q

where is the weak point of the shoulder joint?

A

inferior

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10
Q

True or False
Can the shoulder joint be easily dislocated?

A

True

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11
Q

the arm muscles is surronded by?

A

Deep fascia

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12
Q

Explain the job of the deep fascia

A

it encloses two intramuscular septa: lateral and medial

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13
Q

where are the the two intramuscular septa attached to?

A

the supracondyler ridges of the humerus

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14
Q

what divides the arm into anterior and posterior compartments?

A

the humerus, the two intermuscular septa

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15
Q

name the 3 muscles of the anterior compartment of the arm

A

biceps brachii,coracobrachialis, brachialis

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16
Q

origin and insertion of coracobrachialis

A

origin: coracoid process / insertion: middle of the shaft of the humerus

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17
Q

what cord does the musculocutaneous nerve stem from?

A

lateral cord of brachial plexus

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18
Q

the actions of the biceps brachii are

A

flexion of the elbow joint, flexion and stabliazation of the shoulder joint and its the main supinator muscle on the radioulnar joint.

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19
Q

origin of the brachialis

A

from the medial and lateral intramsucular septa and from the lower 1/2 of the shaft of the humerus

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20
Q

nerve supply for brachialis

A

medially musculocutaneus nerve
laterally radial nerve

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21
Q

insertionof biceps brachii

A

inside the radial tuberosity
by an apenarosis into the superficial fascia

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22
Q

nerve supply of coracobrachialis

A

musculocutaneus nerve

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23
Q

action of the coracobrachilais

A

adduction of the arm
flexion of the shoulder

24
Q

origin of biceps brachii

A

long head: supra glenoid tubercle (intracapsuluar ,extrasynovial)
short head: tip of the coracoid process

25
Q

nerve supply of biceps brachii

A

musculcutaneuos nerve

26
Q

insertion of brachialis

A

ulnar tuberosity and coronoid process

27
Q

the main flexor of teh elbow is

A

brachialis

28
Q

the posterior muscles are called

A

triceps brachii

29
Q

insertion of the triceps brachii

A

inside the olecranon process and the fascia of the aconeus muscle

30
Q

the name of the small traingular msucle posteriorly

A

anconeus muscle

31
Q

what head of the triceps brachiis origin is the infraglenoid tubercle ?

A

the long head

32
Q

which head is considered to be “deep”?

A

medial head

33
Q

posterior to teh humerus above the spiral groove is the origin for what head?

A

lateral head

34
Q

medial head origin?

A

posterior to the humerus belwo the spiral groove

35
Q

where does the brachial artery begin

A

llower border of the teres major msucle

36
Q

in what direction does the brachial artey travel?

A

medially down the humerus

37
Q

at the lower end of the humerus the brachial artery turns

A

anteriorly

38
Q

name the branches of teh brachial artery

A

profundai brachii artery
superior and inferior ulnar collateral arteries and the muscular branches

39
Q

a joint is also known as

A

articulation

40
Q

what cervical numbers is the musculcutaneous nerve made out of

A

C5,6,7

41
Q

what muscle does teh musculocutaneus nerve pierce

A

coracobrachialis

42
Q

how is the lateral cutanueos nerve formed?

A

pierces the fascia that is lateral to the tendons of the biceps

43
Q

where does the lateral cutaneous nerve supply?

A

anteriorly lateral to teh skin of the forearm

44
Q

what cord is the radial nerve formed from?

A

posterior cord in the b rachial plexus

45
Q

nerve supply of the triceps brachii

A

radial nerve, seperate branch supplying each head

46
Q

action of the triceps brachii

A

extension of the elbow
weak extension of the shoulder

47
Q

the job of teh rotator cuff muscles

A

helps hold the head of teh humerus in the glenoid cavity during shoulder movement

48
Q

the median nerve is formed because of what two roots from what two cords?

A

lateral and medial roots and cords

49
Q

cervical numbers of the median nerve

A

C5,6,7,8,and T1

50
Q

the nerve that runs laterally to the brachial artery at first then crosses over and runs medially is

A

the median nerve

51
Q

the radial nerve cervicals number are C5,6,7,8, and T1 and that is because

A

the radial nerve gives branches of nerve fibers from all 5 roots

52
Q

the anatomical journey of the radial nerve

A

exits the axilla and runs posteriorly of the brachial plexus
with teh profunda brachii ( a branch of brachial artery) they enter the posterior compartment
but before doing that, the radial nerve gives out two branches that wll supply the long and medial head of the triceps brachii muscle
runs down inferiorly towards the radual (spiral) groove and wraps around laterally supply the lateral head of the tricpes brachii
giving two sensory branches
1inferior lateral cutaneous nerve of the arm
2 dorsal anetbrachial cutaneous nerve of the forearm
and pierces the lateral intramuscular septa and enters the aterior compartment being situated between the brachioradialis and brachialis

53
Q

the end of the brachial artery

A

opposite the neck of the radius

54
Q

what artery is most commonly used to meausre blood pressure?

A

brachial artery

55
Q

the lateeral cutaneous nerve enters teh forearm,how?

A

enetrs the elbow at teh cubital fossa and passes between the heads of the two pronator teres muscles of the forearm