Session 8- The Elbow Joint

Question 1

What is the CUBITAL fossa?

Answer 1

The fossa in the elbow

Question 2

What is the CUBITAL fossa bounded by?

Answer 2

The medial border= the pronator Teres
Superior border= the imaginary line between the epicondyle
The lateral border= the medial border of the brachioradialis

Question 3

What is the contents of the CUBITAL fossa?

From lateral to medial…

Answer 3

Really Need- Radial nerve
Beer To- Biceps tendon
Be At- Brachial artery
My Nicest- Medial nerve

Question 4

What are the anterior forearm muscles?

Answer 4

There are 3 layers- superficial, intermediate, deep... 
Superficial 
Pronator Teres 
Flexor Carpi radialis 
Profondus longus 
Flexor Carpi ulnaris 

Intermediate
Flexor digitorum superficialis

Deep
Flexor digitorum profundus
Flexor polices longus
Pronator Quadratus

Question 5

Locate the four superficial muscles on your arm…

Answer 5

See complete anatomy

Question 6

Give the origin, insertion, action and innervation of the PRONATOR TERES

Answer 6

Origin-
2 heads
UlNAR head- the Coronado process of the ulna
HUMERAL HEAD- medial epicondyle of the humerus

Insertion- lateral surface of the radius (the most concave part of radius)

Action- Pronates and flexes the forearm

Innervated by the median nerve

Question 7

Give the origin, insertion, action and innervation of the Flexor Carpi radialis

Answer 7

Origin- The medial epicondyle of the humerus

Insertion- The base of the second and third metacarpal

Action- flex and abduct the hand at wrist

Innervation- the median nerve

Question 8

Give the origin, insertion, action and innervation of the Palmaris longus and what is weird about this muscle.

Answer 8

Origin - Medial epicondyle of the humerus

Insertion- The distal half of flexor retinaculum and palmar aponeurosis.

Action- flexes the hand at the wrist

Innervation- the median nerve.

Question 9

Give the origin, insertion, action and innervation of the flexor Carpi ulnaris.

Answer 9

Origin.
Again has 2 heads…
Humeral head- medial epicondyle of the humerus
Ulnar head- Olecranon and posterior ulna

Insertion- Pisiform, hook of hamate, 5th Metacarpal

Action- Flexus and adducted the hand at the wrist

Innervation- Ulnar nerve

Question 10

What are the general rules of the superficial muscles?

Answer 10

They all cross the elbow
They all have attachments to the medial epicondyle
They are innervated by the median nerve

Question 11

What is the flexor digitorum superficialis muscle?

Answer 11

This is the really big intermediate muscle.

Question 12

What are the origins, insertions, actions and innervation of the flexor digitorum superficialis muscle?

Answer 12

The origin:
Humero-ulnar head: Medial epicondyle of the humerus, ulnar collateral ligament of elbow, coronoid process of ulna
Radial head: superior half of anterior border of the radius

Insertion: middle phalanges of the index, middle, ring and little fingers

Action: flexes the midddle phalanges. At the proximal interphalangeal joints (PIPJs)
Flexes the proximal phalanges at the metacarpophalangeal joints.

Is innervated by the median nerve.