3.4.5. Interossei Muscle Compartment Flashcards Preview

3rd Year - MSK Upper Limb Anatomy > 3.4.5. Interossei Muscle Compartment > Flashcards

Flashcards in 3.4.5. Interossei Muscle Compartment Deck (23)
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1
Q

What are the 2 Groups, which the Muscles that act on the Hand, can be Divided into?

A
  1. Extrinsic Muscles

2. Intrinsic Muscles

2
Q

Where are the Extrinsic Muscles of the Hand located?

A
  1. Anterior Compartment of the Forearm

2. Posterior Compartment of the Forearm

3
Q

What are the functions of the Extrinsic Muscles of the Hand?

A
  1. Control Crude Movements

2. Produce a Forceful Grip

4
Q

Where are the Intrinsic Muscles of the Hand located?

A

Within the Hand itself

5
Q

What is the function of the Intrinsic Muscles of the Hand?

A

Fine Motor Control of the Hand

6
Q

What are the 5 Muscle Compartments, of the Intrinsic Muscles of the Hand?

A
  1. Thenar Muscle Compartment
  2. Hypothenar Muscle Compartment
  3. Adductor Compartment
  4. Lumbricals and Long Flexor Tendons (Central) Compartment
  5. Interossei Compartment
7
Q

Where are the Interossei Compartment Muscles located?

A

Between the Metacarpals

Between - Inter; Metacarpal Bones - Ossei = Interossei

8
Q

How many Groups of Interossei Compartment Muscles are there?

A

2

9
Q

What are the 2 Groups of Interossei Compartment Muscles?

A
  1. Dorsal Interossei

2. Palmar Interossei

10
Q

How many Dorsal Interossei Muscles are there?

A

4

11
Q

Where are the Dorsal Interossei Muscles located, in relation to other Dorsal Muscles?

A

These are the Most-Superficial

12
Q
  1. Can the Dorsal Interossei Muscles be palpated?

2. If yes, where?

A
  1. Yes

2. On the Dorsum of the hand

13
Q

Where do the Dorsal Interossei Muscles Originate from?

A
  1. Lateral Surface of the Medial Metacarpal

2. Medial Surface of the Lateral Metacarpal

14
Q

Where do the Dorsal Interossei Muscles attach distally?

A
  1. Extensor Hood of each Finger

2. Proximal Phalanx of each Finger

15
Q

What is the function of the Dorsal Interossei Muscles?

A

Abduction of the Fingers at the Metacarpophalangeal Joint

16
Q

What is the innervation of the Dorsal Interossei Muscles?

A

Deep Branches of the Ulnar Nerve

17
Q

How many Palmar Interossei Muscles are there?

A

3

18
Q

Where are the Palmar Interossei Muscles located?

A

On the Palmar Surface of the Hand

19
Q

Where do the Palmar Interossei Muscles Originate from?

A
  1. Medial Surface of the Metacarpal of the Index Finger
  2. Lateral Surface of the Metacarpal of the Ring Finger
  3. Lateral Surface of the Metacarpal of the Little Finger
20
Q

Where do the Palmar Interossei Muscles attach distally?

A
  1. Extensor Hood of the Same Finger

2. Proximal Phalanx of the same Finger

21
Q

What is the function of the Palmar Interossei Muscles?

A

Adduction of the Finger at the Metacarpophalangeal Joint

22
Q

What is the innervation of the Palmar Interossei Muscles?

A

Deep Branches of the Ulnar Nerve

23
Q

What other functions do both the Dorsal and Palmar Interossei Muscles perform?

A

Assist Lumbrical Muscles in Flexion of the Metacarpophalangeal Joint, and Extension of the Interphalangeal Joints

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