Wrist and Hand
T/F: The proximal joint surfaces of the radiocarpal joint are concave, and the distal surfaces are convex
True
Name the muscle pictured here and it's innervation
Supinator, Radial Nerve (deep branch)
Which one of these muscle stabilizes the elbow joint:
Anconeus, Brachialis, Coracobrachialis, biceps brachii
Anconeus
Primary motions available at the humeroulnar joint
Flexion and extension
The capitulum of the humerus articulates with what bony structure?
Head of the radius
What does ulnar positive mean?
Ulna positive is when the ulna extends further toward the carpals
Name the muscle in the picture and its action
Rectus Capitis Posterior Major; controls movements of skull in nodding and rotation.
Posteriorly rolls and glides
Explain the convex and concave rules
Convex: opposite roll and glide
Concave: "Same" roll and glide
What is the open-packed position of the humerulnar joint?
70 deg flexion, 10 deg supination
T/F: A Colles Fracture is not a common writs fracture, and occurs more in children than adults.
False; It is a very common wrist fracture in adults and is called a FOOSH.
Name the highlighted muscle and it's action
Pronator Quadratus, pronates forearm; deep fibers bind radius and ulna together
Name a muscle that originates from the lateral epicondlye
Anconeus, ECRL, ECRB, Extensor Digitorum, Extensor Digiti Minimi, Supinator
Which lip of the trochlea projects more distally?
Medial
What is normal active elbow flexion range of motion limited by?
Apposition of muscles
Name the palmar surface arches
Distal transverse arch, oblique arch, and longitudinal arch
Name the highlighted muscle and it's origin and insertion
Coracobrachialis
Origin: Coracoid process of scapula
Insertion: Middle third of medial humerus
Which structures comprise the roof of the cubital fossa?
Fascia and biceps aponeurosis
True
Where can you palpate the radial artery pulse?
Proximal to wrist, lateral to flexor carpi radialis (FCR) tendon
The MCP joints are best at creating a strong grip when at what degree of flexion.
70-90 degrees of flexion
Name the highlighted muscle and its action and innervation
Abductor Pollicis Longus
Action: 1st CMC abduction and extension
Innervation: Radial Nerve (posterior interosseous nerve)
Name the type of joint(s) the proximal and distal radioulnar are.
Pivot/trochoid
Name the type of deformity: Occurs with the terminal portion of the extensor tendon ruptures, and then the DIP joint gets stuck into flexion and will not extend when the extensor muscles contract.
Mallet finger
T/F: The radial and ulnar arteries can receive blood flow with a blockage to the brachial artery
False