Dr Preddy

Question 1

Why can brachialis flex forearm when pronated by biceps can’t?

Answer 1

Biceps attaches to radial tuberosity which in wrong direction to flex when pronated. Brachialis inserts to ulna which is not affected during pronation

Question 2

hand is attached to …

Answer 2

radius not ulna, radius is attached to ulna and ulna is attached to elbow
- anything attached to radius will cause pronation/supination ulna won’t

Question 3

What are the 8 muscles of the forearm?

Answer 3

4 superficial 
-
1 intermediate
=
3 deep

Question 4

4 superficial (put hand on forearm from medial epicondyle)

Answer 4

• pronator teres
• Flexor Carpi Radialis
• Palmaris Longus (tendon pops out & 30% don’t have)
• Flexor Carpi Ulnaris

Question 5

Why does the Palmaris Longus tendon pop out?

Answer 5

Is only tendon to NOT go through the carpal tunnel

Question 6

Intermediate muscle?

Answer 6

Flexor Digitorum Superficialis (make girly fist/bye-bye as inserts to the middle phalynx NOT distal/tips of the fingers of lateral 4 digits)

Question 7

What muscle flexes the tips of fingers like you are clawing at something?

Answer 7

FDP not FDS as only goes to middle phalynx

Question 8

3 deep muscles?

punch someone

Answer 8

• FDP (only flexes tips so can make full fist)
• Flexor Pollicis Longus (hide thumb in fist/flex thumb)
• Pronator Quadratus (radius to ulna)

Question 9

What muscles innervated by ulna nerve?

Answer 9

Medial FDP and FCU

ulnar nerve runs under FCU and above FDP

Question 10

Median nerve innervates …

Answer 10

6.5 muscles

Lateral FDP, PT, FCR, PL, FDS, FPL, PQ

Question 11

What do lumbricals do?

Answer 11

straight fingers to thumb (in between knucles)
> run from FDP tendon and into dorsal digital expansion hood causing finger extension
> also flex MCP joint

Question 12

1 half LOAF?

Answer 12

= Median Nerve. Everything else is ulnar. Half of …
Lumbricals (2 lateral/2&3 digit)
OAF
(Opponens, Abductor, Flexor Pollicis - thenar)

Question 13

Ulnar Nerve?

Answer 13

• ulnar lumbricals
• abductor, flexor, opponens digit minim (hypothenar)
• Dimab and Pomad
  (dorsal and palmar interossei)

Question 14

Dorsal Interossei?

Answer 14

Abduct (DIMAB)
> little finger has own
> 3 fingers so 2 muscles? no 4 has 2 for middle finger (abducts 2 ways) and ring and index

Question 15

Palmar Interossei

Answer 15

Adduct (POMAD)

> only have 3 as thumb has own