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Undeleted > Upper Limb, Forearm and Hand Flexors > Flashcards

Upper Limb, Forearm and Hand Flexors Flashcards

1
Q

What are the bony compartments of the forearm?

A

The Radius and the Ulna

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2
Q

What is the cubital fossa?

A

it is the gateway for structures coming from the arm into the forearm.

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3
Q

What is the carpal tunnel?

A

It is the gateway for structures passing from the forearm into the hand.

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4
Q

The forearm is divided into compartments, what are these?

A
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5
Q

Muscles in the anterior compratment of the forearm are generally associated with?

A
  • Movement of the wrist joint
  • flexion of the fingers including the thumb
  • pronation of the forearm
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6
Q

What does the pronator teres do?

A

pronates the forearm

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7
Q

What does the flexor carpi radialis, palmaris longus, flexor carpi ulnaris do?

A

they are involved in movement of the wrist

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8
Q

Name four muscles that share a common origin off the medial epicondyle of the humerus.

A

1) Pronator Teres
2) Flexor Carpi Radialis
3) Palmaris Longus
4) Flexor Carpi Ulnaris

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9
Q

Identify the structures of the superficial layer of the forearm.

A
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10
Q

How does the ulnar nerve enter the anterior compartment of the forearm?

A

By passing by between the two heads of the flexor carpi ulnaris muscle; the humeral and the ulnar.

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11
Q

Identify the following structures.

A
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12
Q

What is the intermediate layer of the forearm composed of?

A

only 1 muscle, flexor digitorum superficialis (FDS) and this has 2 heads

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13
Q

How does the median nerve and ulnar nerve pass through in relation to the flexor digitorum superficialis?

A

it passes deep and in between the heads of FDS.

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14
Q

Identify these structures

A
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15
Q

Does the FDS cross the wrist joint and MCP joint only?

A

NO! it crosses the wrist, the MCP joint and the PIP joint.

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16
Q

What does the FDS do?

A

it acts to casue flexion of the wrist and the fingers

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17
Q

Identify the muscles of the Deep layer of the forearm.

A
18
Q

What is the dual innervation of the FDP?

A
  • lateral half: innervated by a branch of the median nerve and it moves the middle and index fingers.
  • median half: is innervated by the ulnar nerve and it moves the ring and little fingers.
19
Q

What does the FDP cross besides the wrist joint?

A

it crosses the wrist joint, the MCP (metacarpophalangeal) joint, the PIP (Proximal Interphalangeal) joint, and the DIP (Distal Interphlangeal) joint.

20
Q

What does the Flexor Pollicis Longus do?

A

It causes flexion of the thumb, MCP joint and PIP joint.

21
Q

Identify the structures

A
22
Q

Where are the largest arteries of the forearm?

A

in the anterior compartment and they pass distally to give rise to branches that supply the posterior compartment.

23
Q

What does the brachial artery divide into?

A

it divides into 2 branches, the radial and ulnar artery

24
Q

Radial artery

A

supplies the hand with blood

25
Q

Ulnar artery

A

supplies blood to the hand but branches off first to a interosseous artery (1 posterior and 1 anterior)

26
Q

Identify the arteries

A
27
Q

How do median and radial nerves traves to each other?

A

they travel distally in order to innervate the muscles and skin of the hand.

28
Q

What part of the radial nerve will provide innervation to the hand?

A

the superficial branch of the radial nerve wil provide sensory innervation to the dorsal surface.

29
Q

Where does the Median nerve pass through?

A

It passes through the Carpal Tunnel, except for its palmar branch that passes superficial to the flexor retinaculum.

30
Q

Does the Ulnar nerve or its palmar pass throught the Carpal Tunnel?

A

nope…no it does not…at all…just plain no!!

31
Q

Idetify the structures

A
32
Q

Identify the inside and outside structures of the Carpal Tunnel

A
33
Q

Identify these structure of the palm of the hand

A
34
Q

What is a synovial sheath?

A

It is a mucous membrane that does not open to the outside and surrounds tendons and lubricates them.

1 for digits 2,3,4

1 for digit 1 (thumb)

They allow the tendons to slide freely over each other during the movements of the fingers.

35
Q

What are the fibrous digital sheats?

A

They are strong ligamentous tunnels that surround the tendons and their synovial sheaths and prevent the

36
Q

What muscle in the forearm has its own synovial sheat?

A

The Flexor Pollicis Longus

37
Q

Identify the structures

A
38
Q

What is the pollicis?

A

the thumb

39
Q
A
40
Q

What are the 3 layers the muscles in the anterior (flexor) compartment of the forearm?

A

1) Superficial
2) Intermidieate
3) Deep

Undeleted (35 decks)

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