hand_flashcards

Question 1

How are the muscles of the hand classified?

Answer 1

Thenar, hypothenar, and intermediate (mid-palm) muscles.

Question 2

What is the function of the thenar muscles?

Answer 2

Control thumb movement.

Question 3

What is the function of the hypothenar muscles?

Answer 3

Control movement of the little finger.

Question 4

What is the function of the intermediate muscles?

Answer 4

Control fine motor functions and finger movements.

Question 5

Which muscles make up the thenar group?

Answer 5

Abductor Pollicis Brevis, Opponens Pollicis, Flexor Pollicis Brevis, Adductor Pollicis.

Question 6

What is the origin of Abductor Pollicis Brevis?

Answer 6

Flexor retinaculum.

Question 7

Where does Abductor Pollicis Brevis insert?

Answer 7

Base of the proximal phalanx of the thumb.

Question 8

What is the function of Abductor Pollicis Brevis?

Answer 8

Abducts the thumb.

Question 9

What is the origin of Opponens Pollicis?

Answer 9

Flexor retinaculum and trapezium bone.

Question 10

Where does Opponens Pollicis insert?

Answer 10

Base of the 1st metacarpal bone.

Question 11

What is the function of Opponens Pollicis?

Answer 11

Opposes and flexes the thumb, pulling it toward the little finger.

Question 12

What is the origin of Flexor Pollicis Brevis?

Answer 12

Flexor retinaculum, trapezium, trapezoid bones.

Question 13

Where does Flexor Pollicis Brevis insert?

Answer 13

Base of the proximal phalanx of the thumb.

Question 14

What is the function of Flexor Pollicis Brevis?

Answer 14

Flexes the thumb.

Question 15

What is the origin of Adductor Pollicis?

Answer 15

Capitate, 2nd and 3rd metacarpals.

Question 16

Where does Adductor Pollicis insert?

Answer 16

Base of the proximal phalanx of the thumb.

Question 17

What is the function of Adductor Pollicis?

Answer 17

Adducts the thumb.

Question 18

Which muscles make up the hypothenar group?

Answer 18

Opponens Digiti Minimi, Flexor Digiti Minimi Brevis, Abductor Digiti Minimi.

Question 19

What is the origin of Opponens Digiti Minimi?

Answer 19

Flexor retinaculum and hamate bone.

Question 20

Where does Opponens Digiti Minimi insert?

Answer 20

Base of the 5th metacarpal.

Question 21

What is the function of Opponens Digiti Minimi?

Answer 21

Opposes the little finger, pulling it towards the thumb.

Question 22

What is the origin of Flexor Digiti Minimi Brevis?

Answer 22

Flexor retinaculum and hamate bone.

Question 23

Where does Flexor Digiti Minimi Brevis insert?

Answer 23

Base of the proximal phalanx of the little finger.

Question 24

What is the function of Flexor Digiti Minimi Brevis?

Answer 24

Flexes the little finger.

Question 25

What is the origin of Abductor Digiti Minimi?

Answer 25

Pisiform bone.

Question 26

Where does Abductor Digiti Minimi insert?

Answer 26

Base of the proximal phalanx of the little finger.

Question 27

What is the function of Abductor Digiti Minimi?

Answer 27

Abducts the little finger.

Question 28

Which muscles make up the intermediate (mid-palm) group?

Answer 28

Lumbricals, Palmar Interossei, Dorsal Interossei.

Question 29

What is the origin of the Lumbricals?

Answer 29

Tendons of flexor digitorum profundus.

Question 30

Where do the Lumbricals insert?

Answer 30

Extensor expansions of fingers 2-5.

Question 31

What is the function of the Lumbricals?

Answer 31

Flexion at MCP joints and extension at IP joints.

Question 32

What is the origin of Palmar Interossei?

Answer 32

Palmar surface of metacarpals 2, 4, 5.

Question 33

Where do the Palmar Interossei insert?

Answer 33

Proximal phalanges and extensor expansions of digits 2, 4, 5.

Question 34

What is the function of the Palmar Interossei?

Answer 34

Adducts the fingers (towards the middle finger).

Question 35

What is the origin of Dorsal Interossei?

Answer 35

Adjacent sides of metacarpals.

Question 36

Where do the Dorsal Interossei insert?

Answer 36

Proximal phalanges and extensor expansions of digits 2-4.

Question 37

What is the function of the Dorsal Interossei?

Answer 37

Abducts the fingers (away from the middle finger).

Question 38

What is the flexor retinaculum?

Answer 38

A strong band of connective tissue across the wrist.

Question 39

Where does the flexor retinaculum attach?

Answer 39

Spans from the scaphoid and trapezium (laterally) to the pisiform and hamate (medially).

Question 40

What is the function of the flexor retinaculum?

Answer 40

Forms the roof of the carpal tunnel and prevents bowstringing of flexor tendons.

Question 41

What is the palmar aponeurosis?

Answer 41

A triangular sheet of fibrous tissue covering the palm.

Question 42

Where does the palmar aponeurosis attach?

Answer 42

Attaches to the flexor retinaculum and extends into the fingers.

Question 43

What is the function of the palmar aponeurosis?

Answer 43

Protects underlying structures and provides attachment for some hand muscles.