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42 Cards in this Set

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  • Back
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What type of joint is the 1st CMC joint?
Saddle
What are the arthorkinematics at the CMC joint during abduction?
The 1st metacarpal rolls anteriorly and glides posteriorly
What are the arthorkinematics at the CMC joint during flexion?
The 1st metacarpal rolls and glides medially
In what plane does CMC abduction/adduction of the thumb occur?
Sagittal
None
During what movements is the Anterior Oblique Ligament taut?
Abduction and Extension of the CMC joint
What motion causes the Radial Collateral Ligament at the CMC joint to become taut?
Flexion
None
A valgus force applied at the MCP joint of the thumb places stress on what ligament?
Ulnar collateral
During what MCP motion does the palmer ligament become slack?
Flexion
Name the three different kinds of pinch.
Tip-to-tip, Pulp-to-pulp, Power key
How many degrees of motion occur at the MCP joint of the thumb?
One
How many degrees of motion occur at the MCP joint of digits 2-5?
Two
What kind of rotation accompanies flexion at the CMC joint of the thumb?
Medial
True or False: The axis at the MCP and IP joints of the thumb have an anterior/posterior direction?
TRUE
See fig 8-33
Describe the arthrokinematics of abduction at the 2nd MCP joint in an open kinetic chain.
The proximal phalanx rolls and glides in a radial direction.
Describe the arthrokinematics of abduction at the 4th and 5th MCP joint in an open kinetic chain.
The proximal phalanx rolls and glides in a ulnar direction.
What ligament becomes taut during adduction of the 2nd MCP joint?
Radial collateral
See fig 8-30
Which of the CMC joints 2-5 show little to no motion?
2nd and 3rd
See fig 8-11
What is the closed packed position of the CMC joint?
Full opposition
See page 205
What is the closed packed position of the MCP joints 2-5?
Flexion
Which of the interossi adduct the fingers?
Palmer
When the interossi and lumbericals work together, what motions do they produce?
MCP flexion and DIP and PIP extension
See fig 8-53
What nerve roots innervate the dorsal and palmer interossei?
C8 and T1
See page 243
What nerve roots innervate the Flexor Digitium Profundus?
C8, T1
What nerve roots innervate the Flexor Digitium Superficialis?
C8, T1
What nerve roots innervate the Opponenus Pollicis?
C8 and T1
What nerve roots innervate the Oppenens digiti minimi?
C8 and T1
What are the components of the Extensor Mechanism?
Central band, lateral bands, dorsal hood, oblique retinacular ligaments
See page 222
What muscles make up the thenar eminence?
Abd pollicis brevis, flexor pollicis brevis, oppenens pollicis
What muscles make up the hypothenar eminence?
Abd digiti minimi, flexor digiti minimi, Opponens digiti minimi
Describe the Extrinsic-plus position.
MCP extension, PIP and DIP flexion
True or False: The Adductor Pollicis is a primary flexor at the CMC joint of the thumb.
TRUE
See page 224
True or False: The Abductor Pollicis Longus is a primary extendor at the CMC joint of the thumb.
TRUE
See page 224
True or False: The Abductor Pollicis Brevis is a primary opposer at the CMC joint of the thumb.
TRUE
See page 224
True or False: The Adductor Pollicis is a primary flexor at the MCP joint of the thumb.
TRUE
See page 224
What is the convex surface at the 4th PIP joint?
Proximal Phalanx
What is the concave surface at the 4th DIP joint?
Distal Phalanx
Describe the arthrokinematics that ocurr during OKC flexion at the MCP joints 2-5.
The proximal phalanx rolls and glides anteriorly
See figure 8-29
Describe the arthrokinematics that ocurr during OKC extension at the MCP joints 2-5.
The proximal phalanx rolls and glides posteriorly
What ligaments are taut during MCP flexion at the thumb?
Radial and Dorsal
See figure 8-29
What is the function of the Volar Plate?
It checks hyperextension at the MCP joint, it reinforces the jt capsule anteriorly, and prevents impingement of the flexor tendons during MCP flexion.
MCP joints 2-5 are classified as what kind of joint?
Condyloid
Describe tenodesis.
Passive insufficiency occurs in the finger flexors with wrist extension. Important with C6 spinal cord patients who cannot actively grasp b/c of lack of innervation to finger flexors.