Appendicular Skeleton part 2 (final) Flashcards
What is another name for elbow joint?
cubitus
What is the normal carrying angle of the forearm?
5-15 degrees from the torso
What is varus elbow?
elbow deviated laterally (forearm medially deviated)
this can also happen with knee (genu) joint
What is valgus elbow?
elbow deviated medially (forearm laterally deviated)
this can also happen with knee (genu) joint
The interosseous membrane between the radius and ulna is ____________________
syndesmosis (fibrous) and amphiarthrosis
note: this is the same for the leg bone- tibia and fibula
What are the movements of the forearm?
-flexion and extension
-supination and pronation
What are the movements at the wrist?
-extension and flexion
-abduction and adduction
What are the 8 ligaments of the wrist?
1) palmar carpal ligament
2) flexor retinaculum (transverse carpal ligament)
3) extensor retinaculum
4) anterior radiocarpal ligament (also called volar or palmar)
5) posterior radiocarpal ligament (dorsal)
6) radial collateral ligament (LCL)
7) ulnar collateral ligament (MCL)
8) interosseal membrane/ligament (between bones of the antebrachium, syndesmosis, fibrous, amphiarthrotic)
Where is palmer carpal ligament (volar carpal ligament) found and what does it form?
proximal to wrist
forms tunnel of Guyon (ulnar n. and a.)
What does the flexor retinaculum (transverse carpal ligament) form?
forms carpal tunnel (distal to wrist)
Where is the extensor retinaculum found?
superficial to extensor tendons (posterior at wrist, covers wrist joint)
What nerve innervates most of the forearm?
median n.
What are the joints of the wrist and hand?
-distal radioulnar joint
-radiocarpal/radioscaphiod joint
-ulnocarpal/ulnotriquetral joint
-intercarpal joint
-carpometacarpal (CMC) joints (saddle or gliding depending on where)
What type of joint is the distal radioulnar joint?
pivot (uniaxial)
What type of joint is the radiocarpal/radioscaphiod joint?
condyloid (biaxial- radial/ulnar deviation, flexion extension, hyperextension)
What does the ulnocarpal/ulnotriquetral joint make?
the triangular fibrocartilage complex (TFCC)
What type of joint is the intercarpal joint?
planar (uniaxial)
What type of joint is the carpometacarpal joint (CMC) at the 1st digit?
saddle (biaxial- abduction, adduction, opposition, flexion, extension, hyperextension)
What type of joint is the carpometacarpal (CMC) joint at digit 2-5?
gliding joint (uniaxial- abduction, adduction, flexion, extension, hyperextension)
What are the 2 joints of the fingers?
-metacarpophalangeal (MCP) joint
-interphalangeal joint (IP)
Where is the metacarpophalangeal (MCP) joint found?
at the first (proximal) knuckles
What type of joint is the metacarpophalangeal (MCP) joint?
condyloid joint (biaxial- abduction, adduction, flexion, extension, hyperextension)
What ligament attaches to the heads of metacarpals 2-5 and overlaps with the metacarpophalangeal (MCP) joints?
deep transverse metacarpal ligament
What type of joint is the interphalangeal joint (IP)?
hinge (uniaxial- flexion and extension)
What are the 3 kinds of joint capsules at the knuckles?
2nd knuckle= PIP joints
3th knuckle= DIP joints
thumb knuckle= IP joint
What is the interphalangeal joint (IP) supported by?
What does IP connect by?
supported by collateral ligaments and anteriorly/posteriorly by tendons
connected by communal extensor tendon sheath
What are the movements of the fingers?
-abduction and adduction of digit 2-5
-lateral abduction and medial adduction of 3rd digit
-extension and flexion
-opposition and reposition
-pronation and supination
What are the 9 flexor tendons of the carpal tunnel?
-4 flexor digitorum superficialis
-4 flexor digitorum profundus
-1 flexor pollicis longus
What nerve runs through the carpal tunnel?
median n.
What ligament is the medial attachment to the pisiform?
flexor retinaculum
What is the source of tendonitis and swelling in the carpal tunnel?
tenosynovium anteriorly and posteriorly
What is the name for the 1st digit?
thumb, pollex, pollicis
What is the name for the 2nd digit?
index
What is the name for the 3rd digit?
middle or potens
What is the name for the 4th finger?
ring or annular