11/24 Anatomy of Forearm Flexor Muscles!

Question 1

Overview of the forearm Flexors…8 muscles!

Answer 1

Question 2

I just cut right through the pronator teres muscle…what nerve am I worried about damaging and waht motion would be difficult?

Answer 2

median nerve..and pronation!

Question 3

Name the superficial forearm flexors from median to lateral, what is the action and the innervation?

Answer 3

Pronator teres, Flexor carpi redialis, palmaris longus, flexor carpi ulnaris. Flex the wrist, All inervated by the median nerve except FCU that is the ulnar nerve!

Question 4

I just lost the use of a muscle and I can flex the distal interflangeal joint normal but he proximal interfalagieal joint is weaker than usual. what muscle did I lose? I can’t isolate and move my pinky by itself!

Answer 4

the Flexor digitorum superficialis muscle, it goes from the medial epicondial and radius to the middle phalagies!

Question 5

I seel to have lost strength in only the 4th and 5th digits., and espeicially the distal phalangial joint. what muscle and nerve is affected?

Answer 5

the flexor digitorum profundus muscle and the ulnar nerve. The digits 2/3 are the median nerve and the other half of the flexor digitorum profundus muscle!

Question 6

the pronator muscle that is in the forearm by the wrist

Answer 6

the pronator quadratus

Question 7

Name me these muscles and common location, origin, action, and innervation

Answer 7

Location: anterior forearm

Origin: Medial epicondyle

Action: Flexion

Innervation: Median nerve; Ulnar nerve (FCU,1/2FDP)

Question 8

the contents of the Carpal Tunnel

Answer 8

flexor Retinaculum on top

four tendons of the Flexor Digitorum Superficialus

four tendons of the Flexor digiorum profundus

Tendon of the flexor polusu longus

Synovial sheath around the tendons

The median nerve!

Carpal bones

Question 9

the muscles of the posterior forearm over view!

Answer 9

Question 10

the three muscles that would together focus on extending the wrist…

Answer 10

Extensor Carpi radialis logus and brevis and extensor carpi ulnaris!

Question 11

the muscle that pulls the thumb away and down from the pronated hand

Answer 11

the abductor pollisis ongus muscle

Question 12

the two muscles that focus on extending the thumb

Answer 12

Extensor poliicis logus and brevis muscles

Question 13

the principle extendor of the metecarpal phalangial joint

Answer 13

The Extensor digitorum communis muscle

Question 14

What extends the phalangial joints even if the extensor digitorum communis muscle is gone?

Answer 14

the lumbrical muslces.

Question 15

Name me this muslce and action

Answer 15

The extensor digiti minimi muscle that extends the pinky.

Question 16

Name this muscle

Answer 16

Extensor indices muscle.

Question 17

Why is the “rock-on” symbol easy to make?

Answer 17

the indicy and the pinky finger has its own extensor muscles…! two total muscles each to extend them like that!

Question 18

this muslce is an extensor that flexes the elbow

Answer 18

The brachioradialus muscle!

Question 19

what is the common origin; action; and innervation of the back of the forearm muscles?

Answer 19

Action: Extend the wrist and fingers.

Innervation: Radial nerve

Origin: Lateral epicondyle

Question 20

I tore through a small illte muslce and worried about the extension of my wrist because of what nerve?

Answer 20

the radial nerve that goes through the supinator muscle at the top of the forearm

Question 21

What is the floor, boundry, artery and nerve of the anatomicl snuff box?

Answer 21

Floor: Scaphoid bone

Artery: Radial Artery

Roof nerve: superfical radial nerve that innervates the back of the hand

Question 22

What is this muslce (and the three in the group)

Answer 22

Thenar muscles,

Abductor pollicis prvis

Flexor pollicis brevis

opponens policis muscle

Question 23

the actions of the thenar muscles

Answer 23

Abductor

flexor

opponens (thumb to pinky)

Question 24

innervation of the thenar muscles

Answer 24

the recurrent branch of the median nerve (after it traverses the carpal tunnel)

Question 25

What is this grup of muscles?

Answer 25

Hypothenar mucles

Abductor

flexor

and

Opponens digiti minimi mucles

Question 26

I ride my bike for a while and the pinky is numb and weak … why?

Answer 26

gyons canal is squashed which will squish the Ulnar nerve!

Question 27

Identify this muscle group

Answer 27

the lumbricals

Question 28

How is the insertion of the lumbricals unique

Answer 28

They arise on the palmer surface and then wrap around the fingers and insert on the back of the fingers through the extensor expansion hood that courses over the MCP joint.

Question 29

What is the action of the lumbricals?

Answer 29

flex the MCP joint and Extend the IP joints! “point the fingers out!)

Question 30

I cut the ulnar nerve…how does this affect the lumbrical muscles?

Answer 30

the 4th and 5th digit lumbricals will be affected but not the 2nd and 3rd…

Question 31

ID these muscles

Answer 31

the Adductor Pollicis muscles that do thumb adduction

Question 32

ID these muscles on the Dorsal surface of the hand..between the meta carpals. what do they do? innervation?

Answer 32

The Dorsal Interossei muscles. Abduct the MCP joints.

“DAB”

innervated by the ulner nerve!

Question 33

ID these muscles on the palmers surface and what do they do and what innervates them?

Answer 33

Palmer Interossei muscles “PAD” They adduct the hand! and innervated by Ulnar nerve.