Elbow and Wrist Anatomy
What joint sits between the distal bones of the phalanges?
DIP
Which joint sits between the Metacarpals and the Phalanges?
MCP
Where are collateral ligaments found and what motions do they prevent?
They are located on either side of the joints in each finger and prevent side to side movement
Which muscles are flexors of the elbow joint?
biceps brachii, brachialis, brachioradialis
What is the primary flexor of the elbow?
brachialis
Nerves travel through tunnels, when nerves rub against the tunnel, injury occurs. What is the name of the tunnel that the ulnar nerve moves through?
cubital tunnel
What does DIP stand for?
distal interphalangeal joint
What does DIL stand for?
dorsal intercarpal ligament
The radius is on the medial side of the forearm. (true or false)
false
What motions occur at the radiocarpal joint?
flexion, extension, adduction, abduction
What ligament is involved in carpal tunnel syndrome?
flexor retinaculum
What kind of joint is the elbow?
hinge joint
What 3 joints make up the elbow joint?
humeroulnar joint, humeroradial joint, radioulnar joint
The ulna connects to the
humerus
The medial collatoral ligament connencts what 2 bones to one another?
humerus, ulna
The volar plate is the strongest ligament in the finger, what motion does it prevent?
hyperextension
What does IP stand for?
interphalangeal joint
Most of the muscles in the forearm responsible for extending the wrist attach on a bony protrusion of the humerus called the
lateral epicondyle
Muscles in the forearm responsible for wrist flexion attach on a bony protrusion of the humerus called the
medial epicondyle
Which nerve innervates the thenar muscles?
median nerve
Which nerve runs through the carpal tunnel?
median nerve
What does MCP stand for?
metacarpophalangeal joint
What are intrinsic muscles?
muscles that originate in the hand
What are extrinsic muscles?
muscles that originate outside the hand
What are the 4 muscles in the thenar eminence?
opponens policis, adductor policis, flexor policis brevis, abductor policis brevis
What is the anterior part of the hand called (when in anatomical position)
palmer
What does PIL stand for?
palmer intercarpal ligament
What word is included in the name of all the muscles in the thenar eminence?
policis (thumb)
The radioulnar joint is responsible for what motions of the wrist
pronation, supination
What does PIP stand for?
proximal interphalangeal joint
What is the name of the joint between the radius and ulna?
proximal radioulnar joint
Which ligament prevents varus force on the elbow?
radial collateral ligament
What are the three nerves in the arm?
radial, median, ulnar
The biceps tendon is connected to the
radius
What are the bones that make up the elbow joint?
radius, ulna, humerus
The fibrous capsule of the elbow is stronger in what direction and weaker in the other?
stronger posteriorly, weaker anteriorly
What are the 3 articulations of the forearm?
superior radioulnar, middle radioulnar, distal radioulnar
The _______ eminence is the bulge of muscle by the 1st metacarpal, while the ________ eminence is the muscles by the 5th metacarpal
thenar, hypothenar
What is the role of the annular ligament?
to secure the radial head and neck, resists displacement when hand is pulled away from shoulder
What is the TFCC?
triangular fibrocartilage complex
Which muscles are extensors of the elbow joint?
triceps brachii
The Ulna is on the medial side of the forearm. (true or false)
true
What 2 bones make up the forearm?
ulna, radius
What ligament prevents valgus force on the elbow?
ulnar collateral ligament
What 2 ligaments are most commonly injured in the elbow?
ulnar collateral ligament, radial collateral ligament
Which nerve innervates the hypothenar mucles?
ulnar nerve
