ANATOMY & KINESOLOGY Chpt. 6. Elobw + Radioulnar Joints Flashcards
(39 cards)
-Ulna is much larger
__ than radius
-Radius is much larger __than ulna
- proximally
- distally
What 3 bones serve as PROXIMAL attachments for muscles that pronate & supinate the radioulnar joints?
- Scapula
- humerus
- ulna
DISTAL attachments of radioulnar joint muscles are located on __
-radius
What specifically fits into the ulna trochlear notch?
humeral trochlear
Stability in FLEXION is more dependant on:
- lateral (radial collateral ligament)
- medial (ulnar collateral ligament)
Elbow moves from 0 degrees of extension to ___ to ___ degrees of flexion (Hyper extension is common!)
145 - 150
How does the Radioulnar joint work during pronation and supination?
- Pivot-type joint
- Radial head rotates around at proximal ulna
- Distal radius rotates around distal ulna
- ANNULAR LIGAMENT maintains radial head in its joint
- You can Supinate __ - __ degrees from neutral
- Pronate __ -__ degrees from neutral
S: 80-90 degrees
P: 70-90
What do the Elbow FLEXOR consists of? 4
- Biceps brachii
- Brachialis
- Brachioradialis
- Weak assistance from Pronator teres
What do the Elbow EXTENSOR consists of? 2
- Triceps brachii
- Anconeus provides assistance
What do the Radioulnar PRONATORS consist of? 3
- Pronator teres
- Pronator quadratus
- Brachioradialis
What do the Radioulnar SUPINATORS consist of? 3
- Biceps brachii
- Supinator muscle
- Brachioradialis
What is another term for Lateral epicondylitis and what is it associated with?
“Tennis Elbow”: with gripping and lifting activities
What is Medial epicondylitis? and how is it caused?
“Golfers Elbow”: repetitive movement
What are some Anterior: Primarily flexion & pronation muscles? 5
- Biceps brachii
- Brachialis
- Brachioradialis
- Pronator teres
- Pronator quadratus
What are some Posterior:
Primarily extension & supination muscles? 3
- Triceps brachii
- Anconeus
- Supinator
All elbow & radioulnar joints muscles are innervated from: (3)
-Median, musculotaneous, and radial nerves of brachial plexus
*RADIAL nerve - branches from C5, C6, C7, & C8: which muscles do they affect (4)
- Triceps brachii
- Brachioradialis
- Supinator (posterior interosseous nerve)
- Anconeus
- Sensation to posterolateral arm, forearm, & hand
*Median nerve - branches from C6- C7: which muscles do they affect? (3)
- Pronator teres
- Pronator quadratus (anterior interosseus nerve)
- Sensation to palmar aspect of -hand & first three phalanges, palmar aspect of radial side of fourth finger, dorsal aspect of index & long fingers
*Musculocutaneous nerve - branches from C5-C6: which muscles do they affect? (2)
- Biceps brachii
- Brachialis
What is the OINA for Biceps Brachii? (two origins)
O: (Short head):Corachoid Process (Long Head): Supraglenoid tubercle I: Radial Tuberosity N: Musculocutaneous A: Flexion/Supination
DONT NEED TO KNOW:
What is a THERBAND and STRENGTHENING exercise for Biceps Brachii?
Th: standing on therband + curling
Strengthening: curl/flex elbow
**What is the OINA for Brachialis?
**O: Distal half of humerus
**I: Corachoid process
N: Musculocutaneous
A: Flexion
DONT NEED TO KNOW:
What is a THERBAND and STRENGTHENING exercise for Brachialis ?
Th: Stand on Th and curl in Pronation
Strength: Fully Pronate (hand down) and curl up (flex)
