3.4.2. Hypothenar Muscle Compartment Flashcards Preview

3rd Year - MSK Upper Limb Anatomy > 3.4.2. Hypothenar Muscle Compartment > Flashcards

Flashcards in 3.4.2. Hypothenar Muscle Compartment Deck (26)
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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

How many Hypothenar Muscles are there?

A

3

8
Q

Where are the Hypothenar Muscles located?

A
  1. Medial Aspect of the Palm

2. Base of the Little Finger

9
Q

What is the name of the Bulge which the Hypothenar Muscle Bellies produce?

A

Hypothenar Eminence

10
Q

What innervated the Hypothenar Muscles?

A

Deep Branches of the Ulnar Nerve

11
Q

What are the 3 Hypothenar Muscles?

A
  1. Opponens Digiti Minimi
  2. Abductor Digiti Minimi
  3. Flexor Digiti Minimi Brevis
12
Q

Where is the Opponens Digiti Minimi located, in relation to the other 2 Hypothenar Muscles?

A

Deep to the other 2 (Underneath)

13
Q

Where does the Opponens Digiti Minimi Originate from?

A
  1. Hamate

2. Associated Flexor Retinaculum

14
Q

Where does the Opponens Digiti Minimi attach distally?

A

Medial Margin of the Fifth Metacarpal

15
Q
  1. What is the function of the Opponens Digiti Minimi?

2. How does it do this?

A
  1. Opposes the Little Finger

2. Rotation of the Metacarpal of the Little Finger towards the Palm

16
Q

What is the innervation of the Opponens Digiti Minimi?

A

Deep Branch of the Ulnar Nerve

17
Q

Where is the Abductor Digiti Minimi located, in relation to the other 2 Hypothenar Muscles?

A

It is the most Superficial of the Hypothenar Muscles

18
Q

Where does the Abductor Digiti Minimi Originate from?

A
  1. Pisiform

2. Tendon of the Flexor Carpi Ulnaris

19
Q

Where does the Abductor Digiti Minimi attach distally?

A

Base of the Proximal Phalanx of the Little Finger

20
Q

What is the function of the Abductor Digiti Minimi?

A

Abducts the Little Finger

21
Q

What is the innervation of the Abductor Digiti Minimi?

A

Deep Branch of the Ulnar Nerve

22
Q

Where is the Flexor Digiti Minimi Brevis located, in relation to the other 2 Hypothenar Muscles?

A
  1. Superficial / Anterior to the Opponens Digiti Minimi

2. Laterally to the Abductor Digiti Minimi

23
Q

Where does the Flexor Digiti Minimi Brevis Originate from?

A
  1. Hook of the Hamate

2. Adjacent Flexor Retincaulum

24
Q

Where does the Flexor Digiti Minimi Brevis attach distally?

A

Base of the Proximal Phalanx of the Little Finger

25
Q

What is the function of the Flexor Digiti Minimi Brevis?

A

Flexion of the Metacarpophalangeal Joint of the Little Finger

26
Q

What is the function of the Flexor Digiti Minimi Brevis?

A

Deep Branch of the Ulnar Nerve

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