ANATOMY & KINESOLOGY Chpt. 6. Elobw + Radioulnar Joints Flashcards
-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)
What is the OINA for Brachioradialis?
**O: Supracondular ridge
I: Radial styloid
N: Radial Nerve
A: Flexion, and slightly Pronation/Supination (both at the same time)
DONT NEED TO KNOW:
What is a THERBAND and STRENGTHENING exercise for Brachioradialis ?
TH: stand on TH and thumb up- side way curl ups
Strength: thumb up- side way curl up
**What is the OINA for Triceps Brachii ? (3 origins/heads)
O: Long H: infraglenoid tubercle
Lateral H: proximal ½ of humerus
Medial H: distal 2/3 of humerus
I: Olecranon process of ulna
•N: radial nerve
A: Elbow extension
DONT NEED TO KNOW:
What is a THERBAND and STRENGTHENING exercise for Triceps Brachii ?
Strength: tricep kick back (bent over extending elbow), behind head elbow extension
TH: hold therband in hand and bring it across/behind head and extend elbow
What is the OINA for Anconeous?
O: Lateral Condyle (back of capitulum)
I: Posterior-Proximal ulna
N: Radial Nerve
A: elbow extension
Which other muscle group is the same STRENGTHENING and THERBAND as Anconeous muscle?
Tricep Brachii
??x What is the OINA for Supinator Muscle? (2 origins)
O: Lateral epicondyle, Posterior-proximal ulna
I: Proximal Radius
N: Radial Nerve
A: supinates
DONT NEED TO KNOW:
What is a THERBAND and exercise for Supinator Muscle?
TH: supination (hold TH and supinate with other hand)
What is the OINA for Pronator Teres Muscle?
O: Medial Epicondyle
I: Middle 1/3 of Radius
N: Median Nerve
A: Pronation
DONT NEED TO KNOW:
What is a THERBAND and exercise for Pronator Teres Muscle?
TH: pronating against resistance
What is the OINA for Pronator Quadratus Muscle?
*TH exercise same as Pronator teres
O: Distal ¼ of Ulna
I: Distal ¼ of radius
N: Median Nerve
A: Pronation
What are the 3 Agonists for: ELBOW FLEXION (Bicep curls) ?
- Biceps brachii
- Brachialis
- Brachioradialis
What are the 2 Agonists for: ELBOW EXTENSION (push-ups) ?
- Triceps brachii
- Anconeus
What are the 3 Agonists for: RADIOULNAR PRONATION?
- Pronator teres
- Pronator quadratus
- Brachioradialis
What are the 3 Agonists for: RADIOULNAR SUPINATION (tightening screw)?
- Biceps brachii
- Supinator muscle
- Brachioradialis
