3.4.2. Hypothenar Muscle Compartment

Question 1

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

Answer 1

1. Extrinsic Muscles

2. Intrinsic Muscles

Question 2

Where are the Extrinsic Muscles of the Hand located?

Answer 2

1. Anterior Compartment of the Forearm

2. Posterior Compartment of the Forearm

Question 3

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

Answer 3

1. Control Crude Movements

2. Produce a Forceful Grip

Question 4

Where are the Intrinsic Muscles of the Hand located?

Answer 4

Within the Hand itself

Question 5

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

Answer 5

Fine Motor Control of the Hand

Question 6

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

Answer 6

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

Question 7

How many Hypothenar Muscles are there?

Answer 7

3

Question 8

Where are the Hypothenar Muscles located?

Answer 8

1. Medial Aspect of the Palm

2. Base of the Little Finger

Question 9

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

Answer 9

Hypothenar Eminence

Question 10

What innervated the Hypothenar Muscles?

Answer 10

Deep Branches of the Ulnar Nerve

Question 11

What are the 3 Hypothenar Muscles?

Answer 11

1. Opponens Digiti Minimi
2. Abductor Digiti Minimi
3. Flexor Digiti Minimi Brevis

Question 12

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

Answer 12

Deep to the other 2 (Underneath)

Question 13

Where does the Opponens Digiti Minimi Originate from?

Answer 13

1. Hamate

2. Associated Flexor Retinaculum

Question 14

Where does the Opponens Digiti Minimi attach distally?

Answer 14

Medial Margin of the Fifth Metacarpal

Question 15

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

2. How does it do this?

Answer 15

1. Opposes the Little Finger

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

Question 16

What is the innervation of the Opponens Digiti Minimi?

Answer 16

Deep Branch of the Ulnar Nerve

Question 17

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

Answer 17

It is the most Superficial of the Hypothenar Muscles

Question 18

Where does the Abductor Digiti Minimi Originate from?

Answer 18

1. Pisiform

2. Tendon of the Flexor Carpi Ulnaris

Question 19

Where does the Abductor Digiti Minimi attach distally?

Answer 19

Base of the Proximal Phalanx of the Little Finger

Question 20

What is the function of the Abductor Digiti Minimi?

Answer 20

Abducts the Little Finger

Question 21

What is the innervation of the Abductor Digiti Minimi?

Answer 21

Deep Branch of the Ulnar Nerve

Question 22

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

Answer 22

1. Superficial / Anterior to the Opponens Digiti Minimi

2. Laterally to the Abductor Digiti Minimi

Question 23

Where does the Flexor Digiti Minimi Brevis Originate from?

Answer 23

1. Hook of the Hamate

2. Adjacent Flexor Retincaulum

Question 24

Where does the Flexor Digiti Minimi Brevis attach distally?

Answer 24

Base of the Proximal Phalanx of the Little Finger

Question 25

What is the function of the Flexor Digiti Minimi Brevis?

Answer 25

Flexion of the Metacarpophalangeal Joint of the Little Finger

Question 26

What is the function of the Flexor Digiti Minimi Brevis?

Answer 26

Deep Branch of the Ulnar Nerve