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42 Cards in this Set
- Front
- Back
- 3rd side (hint)
What type of joint is the 1st CMC joint?
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Saddle
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What are the arthorkinematics at the CMC joint during abduction?
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The 1st metacarpal rolls anteriorly and glides posteriorly
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What are the arthorkinematics at the CMC joint during flexion?
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The 1st metacarpal rolls and glides medially
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In what plane does CMC abduction/adduction of the thumb occur?
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Sagittal
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None
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During what movements is the Anterior Oblique Ligament taut?
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Abduction and Extension of the CMC joint
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What motion causes the Radial Collateral Ligament at the CMC joint to become taut?
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Flexion
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None
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A valgus force applied at the MCP joint of the thumb places stress on what ligament?
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Ulnar collateral
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During what MCP motion does the palmer ligament become slack?
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Flexion
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Name the three different kinds of pinch.
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Tip-to-tip, Pulp-to-pulp, Power key
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How many degrees of motion occur at the MCP joint of the thumb?
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One
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How many degrees of motion occur at the MCP joint of digits 2-5?
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Two
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What kind of rotation accompanies flexion at the CMC joint of the thumb?
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Medial
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True or False: The axis at the MCP and IP joints of the thumb have an anterior/posterior direction?
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TRUE
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See fig 8-33
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Describe the arthrokinematics of abduction at the 2nd MCP joint in an open kinetic chain.
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The proximal phalanx rolls and glides in a radial direction.
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Describe the arthrokinematics of abduction at the 4th and 5th MCP joint in an open kinetic chain.
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The proximal phalanx rolls and glides in a ulnar direction.
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What ligament becomes taut during adduction of the 2nd MCP joint?
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Radial collateral
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See fig 8-30
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Which of the CMC joints 2-5 show little to no motion?
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2nd and 3rd
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See fig 8-11
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What is the closed packed position of the CMC joint?
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Full opposition
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See page 205
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What is the closed packed position of the MCP joints 2-5?
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Flexion
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Which of the interossi adduct the fingers?
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Palmer
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When the interossi and lumbericals work together, what motions do they produce?
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MCP flexion and DIP and PIP extension
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See fig 8-53
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What nerve roots innervate the dorsal and palmer interossei?
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C8 and T1
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See page 243
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What nerve roots innervate the Flexor Digitium Profundus?
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C8, T1
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What nerve roots innervate the Flexor Digitium Superficialis?
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C8, T1
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What nerve roots innervate the Opponenus Pollicis?
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C8 and T1
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What nerve roots innervate the Oppenens digiti minimi?
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C8 and T1
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What are the components of the Extensor Mechanism?
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Central band, lateral bands, dorsal hood, oblique retinacular ligaments
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See page 222
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What muscles make up the thenar eminence?
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Abd pollicis brevis, flexor pollicis brevis, oppenens pollicis
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What muscles make up the hypothenar eminence?
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Abd digiti minimi, flexor digiti minimi, Opponens digiti minimi
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Describe the Extrinsic-plus position.
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MCP extension, PIP and DIP flexion
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True or False: The Adductor Pollicis is a primary flexor at the CMC joint of the thumb.
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TRUE
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See page 224
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True or False: The Abductor Pollicis Longus is a primary extendor at the CMC joint of the thumb.
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TRUE
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See page 224
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True or False: The Abductor Pollicis Brevis is a primary opposer at the CMC joint of the thumb.
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TRUE
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See page 224
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True or False: The Adductor Pollicis is a primary flexor at the MCP joint of the thumb.
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TRUE
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See page 224
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What is the convex surface at the 4th PIP joint?
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Proximal Phalanx
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What is the concave surface at the 4th DIP joint?
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Distal Phalanx
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Describe the arthrokinematics that ocurr during OKC flexion at the MCP joints 2-5.
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The proximal phalanx rolls and glides anteriorly
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See figure 8-29
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Describe the arthrokinematics that ocurr during OKC extension at the MCP joints 2-5.
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The proximal phalanx rolls and glides posteriorly
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What ligaments are taut during MCP flexion at the thumb?
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Radial and Dorsal
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See figure 8-29
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What is the function of the Volar Plate?
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It checks hyperextension at the MCP joint, it reinforces the jt capsule anteriorly, and prevents impingement of the flexor tendons during MCP flexion.
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MCP joints 2-5 are classified as what kind of joint?
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Condyloid
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Describe tenodesis.
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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.
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