10. Joints in wrist and hand Flashcards
What type of joint is the radiocarpal joint? There articulations?
an ellipsoid biaxial synovial joint formed by the distal end of the radius (an articular disc) and the scaphoid, lunate, and triquetrum carpal bones.
5 movements at the wrist
flexion, extension, abduction, adduction, and circumduction.
Between the proximal and distal rows of carpal bones lies the ____ (what joint?)
midcarpal (intercarpal) joints, synovial plane joints.
Type of joints are the midcarpal (intercarpal) joints? What are the movements?
synovial plane joints
→ These joints permit some gliding and sliding movements.
Identify 1 - 3
- Metacarpal bone
- Joint capsule
- Metacarpophalangeal (MP) joint
Identify 4 - 6
- Proximal interphalangeal (PIP) joint
- Distal interphalangeal (DIP) joint
- Phalangeal bones (Proximal; Middle; Distal)
Identify 7 - 8
- Palmar ligament (palmar plate)
- Collateral ligament
What type of joints are the metacarpophalangeal joints? Their movements?
biaxial condyloid synovial joints that participate in flexion and extension, abduction and adduction, and circumduction
The metacarpophalangeal joints are biaxial condyloid synovial joints that participate in flexion and extension, abduction and adduction, and circumduction.
→ The capsule is supported by ___ (ligaments?)
the collateral and palmar (volar) ligaments.
The metacarpophalangeal joints are biaxial condyloid synovial joints that participate in flexion and extension, abduction and adduction, and circumduction.
→ The capsule is supported by the collateral and palmar (volar) ligaments.
→ The collateral ligaments are tight in (1)___ and loose in (2)___.
- flexion
- extension
Identify 1
- Joint capsule
The interphalangeal joints for digits 2 through 5 include ____ (2 joints)
a proximal interphalangeal joint and a distal interphalangeal joint
Identify 2
Flexor digitorum superficialis tendons (cut)
Identify 3
Flexor digitorum profundus tendons
Identify 4
Palmar ligaments (palmar plates)
Identify 5
Deep transverse metacarpal ligaments
Identify 6 - 7
- Palmar metacarpal ligaments
- Palmar carpometacarpal ligaments
The interphalangeal joints for digits 2 through 5 include a proximal interphalangeal joint and a distal interphalangeal joint.
→ What type(s) of joints are these joints?
The interphalangeal joints are uniaxial (hinge) joints
