forearm

Question 1

superficial flexor muscles

Answer 1

(pronator teres, flexor carpi radialis, palmaris longus, and
flexor carpi ulnaris)

Question 2

intermediate layer muscles flexor

Answer 2

flexor digitorum superficialis

Question 3

deep layer flexor muscle

Answer 3

(flexor
digitorum profundus, flexor pollicis longus, and
pronator quadratus

Question 4

Pronator teres
origin

Answer 4

by 2 heads
• Humeral head: lower part of
the medial supracondylar
ridge & medial epicondyle of
humerus (common flexor
origin).
• Ulnar head: Coronoid
process of ulna.

Question 5

Pronator teres
insertion

Answer 5

Middle of
convexity of lateral surface of
radius.

Question 6

Pronator teres nerve& action

Answer 6

Nerve supply: Median nerve.
➢ Action: Pronates and flexes
forearm (at elbow)

Question 7

Flexor carpi radialis
origin_ insertion

Answer 7

Origin: Medial epicondyle
of humerus (common
flexor origin).
➢ Insertion: Base of 2nd
metacarpal, sending a slip
to the third metacarpal.

Question 8

Flexor carpi radialis
nerve_action

Answer 8

Nerve supply: Median
nerve.
➢ Action: Flexes and
abducts hand (at wrist)

Question 9

Palmaris longus origin -insertion

Answer 9

Origin: Medial
epicondyle of humerus
(common flexor origin).
➢ Insertion: Distal half of
flexor retinaculum and
apex of palmar
aponeurosis.

Question 10

Palmaris longus
herve_ action

Answer 10

Nerve supply: Median
nerve.
➢ Action: Flexes hand (at
wrist) and tenses palmar
aponeurosis.

Question 11

Flexor carpi
ulnaris origin

Answer 11

by 2 heads
• Humeral head : Medial
epicondyle of humerus
(common flexor origin).
• Ulnar head: Olecranon and
posterior border (via
aponeurosis) of ulna

Question 12

Flexor carpi
ulnaris
insertion

Answer 12

➢ Insertion: Pisiform, then
through ligaments to hook of
hamate & base of 5th
metacarpal bone through
pisohamate & pisometcarpal
ligaments.

Question 13

Flexor carpi
ulnaris nerve-action

Answer 13

Nerve supply: Ulnar nerve.
➢ Action: Flexes and adducts
hand (at wrist)

Question 14

Flexor digitorum
superficialis
origin

Answer 14

• Humeroulnar head: Medial
epicondyle (common flexor origin)
and coronoid process.
• Radial head: Superior half of anterior
border (ant.oblique line) of radius

Question 15

Flexor digitorum
superficialis
insertion

Answer 15

: Shafts of middle phalanges
of medial four fingers

Question 16

Flexor digitorum
superficialis
nerve_action

Answer 16

➢ Nerve supply: Median nerve.
➢ Action: Flexes middle phalanges at
proximal interphalangeal joints of
middle four fingers; acting more
strongly, it also flexes proximal
phalanges at metacarpophalangeal
joints

Question 17

Flexor digitorum
profundus
➢ Origin

Answer 17

Proximal three quarters of
medial and anterior surfaces of ulna
and interosseous membrane.

Question 18

Flexor digitorum
profundus insertion

Answer 18

Insertion: Bases of distal phalanges
of the medial 4 fingers.

Question 19

Flexor digitorum
profundus nerve_ action

Answer 19

➢ Nerve supply:
• Medial part: Ulnar nerve.
• Lateral part: Anterior interosseous
nerve, from median nerve.
➢ Action: Flexes distal phalanges of
the medial 4 fingers at distal
interphalangealjoints

Question 20

Flexor pollicis
longus
➢ Origin:

Answer 20

Anterior surface of
radius and adjacent
interosseous membrane.

Question 21

Flexor pollicis
longus
insertion

Answer 21

Base of distal phalanx
of thumb.

Question 22

Flexor pollicis
longus nerve - action

Answer 22

➢ Nerve supply: : Anterior
interosseous nerve, from
median nerve.
➢ Action: Flexes phalanges of 1st
digit (thumb

Question 23

Pronator quadratus
➢ Origin:

Answer 23

Distal quarter of
anterior surface of ulna

Question 24

Pronator quadratus insertion

Answer 24

Distal quarter of
anterior surface of radius

Question 25

Pronator quadratus nerve_action

Answer 25

➢ Nerve supply: Anterior
interosseous nerve, from
median nerve.
➢ Action: Pronates forearm;
deep fibers bind radius and
ulna together