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Anatomy Block 1 > Arm, Cubital Fossa and Flexor Forearm > Flashcards

Arm, Cubital Fossa and Flexor Forearm Flashcards

1
Q

The arm is encased in brachial fascia that is continuous proximally with ____ and inserts ____

A

1) continues proximally with axillary and pectoral fascias

2) attaches distally to the humeral epicondyles and olecranon of the ulna

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2
Q

What is the ligament in the wrist that prevents “bowstringing”?

A

palmar carpal ligament

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3
Q

the posterior medial epicondyle bears a grove for which nerve?

A

ulnar n.

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4
Q

which bone is longer: ulna or radius?

A

ulna

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5
Q

what is the tough, strong and fibrous sheaet that unites the ulna and radius?

A

interosseous membrane

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6
Q

What two ligaments reinforce and stabilize the elbow joint?

A

radial collateral ligaments and ulnar collateral ligaments

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7
Q

what holds the proximal radioulnar joint in place?

A

annular ligament

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8
Q

The three muscles that form the flexor compartment of the arm are:

A

1) Biceps brachii
2) Brachialis
3) Coracobrachialis

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9
Q

Biceps brachii short head: origin

A

coracoid process

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10
Q

Biceps brachii long head: origin

A

long head of supraglenoid tubercle

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11
Q

The tendon of long head transversesthe glenohumeral joint and intertubercular groove where it is held in place by the

A

transverse humeral ligament

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12
Q

Biceps brachii: insertion

A

radial tuberosity and forearm fascia via bicipital aponeurosis

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13
Q

Biceps brachii: innervation

A

musculocutaneous nerve

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14
Q

Biceps brachii: actions

A

flex supine forearm

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15
Q

Coracobrachialis: Origin

A

coracoid process

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16
Q

Coracobrachialis: Insertion

A

medial humerus (middle 1/3)

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17
Q

Coracobrachialis: Innervation

A

musculocutaneous nerve

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18
Q

Coracobrachialis: actions

A

Flexes and Adducts arm at glenohumeral joint

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19
Q

Name the muscle that is deep to the biceps and cross the elbow joint?

A

Brachialis

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20
Q

Brachialis: Origin

A

distal half of anterior humerus

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21
Q

Brachialis: Insertion

A

Coronoid process and ulnar tuberosity

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22
Q

Brachialis: Innervation

A

Musculocutaneous nerve

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23
Q

Brachialis: Actions: Actions

A

Flexes in all position

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24
Q

What is the only extensor muscles int he posterior compartment of the arm?

A

Triceps Brachii

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25
Triceps Brachii- Long head: Origin
infraglenoid tubercle
26
Triceps Brachii- Lateral head: Origin
from posterior humerus superior to the radial groove
27
Triceps Brachii- Medial head: Origin
from posterior humerus inferior to the radial groove
28
Triceps Brachii: Inserition
Olecranon of the ulna and forearm fascia
29
Triceps Brachii: Innervation
Radial Nerve
30
Triceps Brachii: Actions
Major extensor of the elbow joint | Long head- adducts at the glenohumeral joint
31
What are the 4 superficial muscles of the flexor forearm?
Pronator Teres Flexor Carpi Radialis Palmarus Longus Flexor Carpi Ulnaris
32
The intermediate muscle of the flexor forearm is called?
Flexor Digitorum Superficialis
33
The deep muscles of the flexor forearm are:
Flexor pollicis longus Flexor Digitorum profundus Pronator quadratus
34
The superficial and intermediate muscles arise from?
the medial epicondyle
35
Pronator Teres: Origin
humeral head of medial epicondyle via common flexor tendon; ulnar head from coronoid process
36
Pronator Teres: Insertion
middle of lateral radius
37
Pronator Teres: Innervation
Median Nerve
38
Pronator Teres: Actions
Pronates and flexes forearm at elbow
39
Flexor Carpi Radialis: Origin
medial epicondyle of humerus via common flexor tendon
40
Flexor Carpi Radialis: Insertion
Base of 2nd metacarpal
41
Flexor Carpi Radialis: Innervation
Median Nerve
42
Flexor Carpi Radialis: actions
flexes and aBducts
43
Palmaris Longus: Origin
medial epicondyle of humerus via common flexor tendon
44
Palmaris Longus: Insertion
Flexor retinaculum and apex of palmar aponeurosis
45
Palmaris Longus: Innervation
Median Nerve
46
Palmaris Longus: Actions
Flex hand at wrist; tenses palmar aponeurosis
47
Flexor Carpi Ulnars: Origin
medial epicondyle of humerus via common flexor tendon
48
Flexor Carpi Ulnars: Insertion
Pisiform, hook of hamate and 5th metacarpal
49
Flexor Carpi Ulnars: Innervation
Ulnar n
50
Flexor Carpi Ulnars: Actions
Flexes and Adducts hand at wrist
51
Flexor Digitorum Superficialis- Humeral Head: Origin
medial epicondyle of humerus via common flexor tendon
52
Flexor Digitorum Superficialis- Radial Head: Origin
superhalf of anterior radius
53
Flexor Digitorum Superficialis: Insertion
middle phalanges of the medial four digits
54
Flexor Digitorum Superficialis: Innervation
Median Nerve
55
Flexor Digitorum Superficialis: Actions
Flexes PIP and MP joints
56
Flexor Digatorum Profundus: Origin
proximal 3/4 of anterior ulna and interosseous membrane
57
Flexor Digatorum Profundus: Insertion
distal phalanges of medial four digits (2-5)
58
Flexor Digatorum Profundus: Innervation
medial part of ulnar nerve | lateral part of anterior interosseous nerve (branch of median n)
59
Flexor Digatorum Profundus: Actions
Flexes DIP joints
60
Flexor Pollicis Longus: Origin
anterior radius and adjacent interosseous membrane
61
Flexor Pollicis Longus: Insertion
base of distal phalanx of thumb
62
Flexor Pollicis Longus: Innervation
Anterior interosseous nerve
63
Flexor Pollicis Longus: Actions
deep flexor of the thumb
64
Pronator Quadratus: Origin
distal 1/4 of anterior ulna
65
Pronator Quadratus: Insertion
distal 1/4 of anterior radius
66
Pronator Quadratus: Innervation
Anterior interosseous nerve
67
Pronator Quadratus: Actions
Pronates forearm
68
What is the triangular region anterior to the elbow joint?
Cubital Fossa
69
What are the cubital fossa contents?
brachila, radial, ulnar arteries and their venae comitantes biceps brachii tendon median n
70
Where does the brachial artery begin?
inferior border of teres major
71
The largest branch of the brachial artery is the
deep brachial artery
72
Where does the deep brachial artery run?
It passes posterior to the humerus accompanies the radial nerve in the radial groove to supply the extensor arm
73
What are the arteries that arise form the distal brachial artery and help form elbow anastomosis?
super & inferior ulnar collateral arteries
74
The deep brachial after terminates as?
radial collateral and middle collateral arteries
75
The brachial artery enters the cubital fossa and terminate by dividing into the?
radial and ulnar arteries
76
Where does the ulnar artery run?
It passes deep to the pronator trees and descends lateral to the ulnar nerve
77
What does the ulnar nerve supply?
medial flexor compartment
78
What are proximal branches of the ulnar artery that join the elbow anastamoses?
anterior and posterior ulnar recurrent arteries
79
A short branch of the ulnar artery is the common interosseous artery that splits into anterior and posterior interosseous arteries, What structures does the anterior interosseous artery run with?
the anterior interosseous artery joins the anterior interosseous nerve and passes anterior to the interosseous membrane
80
What supplies the lateral flexor compartments?
Radial nerve
81
What is the pathway for the cephalic vein?
Cephalic vein ascents in the lateral forearm and arm. It enters the deltopectoral groove and triangle and joins the termination of the axillary vein superior to pectoralis minor
82
the Basilic vein ascends from the?
medial forearm
83
What does the radial nerve innervate?
Triceps (Extensors)
84
What nerve pierces the coracobracialis?
musculocutaneous
85
Where does the radial nerve run?
It emerges between the brachioradialis and brachialis and enters the cubital fossa anterior to the lateral epicondyle
86
What nerve enters the cubital fossa deep to the bicipital aponeurosis and medial to the brachial artery?
Median nerve
87
What muscles does the ulnar n run between?
between the heads of flexor carpi ulnaris and the medial half of flexor digitorum profundus
88
What nerves provide sensation to the skin of the medial arm?
``` Intercostobrachial nerve (lateral cutaneous branch of T2) Medial cutaneous nerve (medial cord of brachial plexus) ```
89
What nerves innervate the skin of the lateral arm?
superior lateral cutaneous nerve of arm (branch of axillary n) inferior lateral cutaneous nerve of arm (branch of radial n)
90
What nerves innervate the skin of the posterior arm?
superior lateral cutaneous nerve (branch of axillary n) posterior cutaneous nerve of arm (branch of radial n) inferior lateral cutaneous nerve of arm (branch of radial n)
91
What innervates the skin of the medial forearm?
Medial cutaneous nerve
92
What innervates the skin of the lateral forearm?
Lateral cutaneous nerve
93
What innervates the skin of the posterior forearm?
Posterior cutaneous nerve

Anatomy Block 1 (6 decks)

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