Term
| Midcarpal joint has how many degrees of freedom? What osteokinematic motions does it offer? |
|
Definition
1 degree of freedom
flexion/extension |
|
|
Term
| Radiocarpal joint has how many degrees of freedom? What osteokinematic motions does it offer? |
|
Definition
2 degrees of freedom
flexion/extension and abduction/adduction (radial and ulnar deviation) |
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Term
| The multi-joint complex of the wrist allows? |
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Definition
-Greater ROM with less exposed articular surfaces
-Tighter joint capsule, increasing stability
-Decreased chance of impingement of the long tendons at extreme ranges |
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Term
| How many degrees of radial deviation can normally be expected at the radiocarpal joint? |
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Definition
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Term
| How many degrees of ulnar deviation can normally be expected at the radiocarpal joint? |
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Definition
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Term
| How many degrees of total flexion and extension can be expected at the radiocarpal joint? |
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Definition
| 160 degrees, more flexion than extension |
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Term
| Horizontal or transverse axis at wrist or fingers move the joint in what osteokinematic motion? |
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Definition
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Term
| A/P axis at the wrist moves the joint in what osteokinematic motion? |
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Definition
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Term
| __________ creates the roof of the carpal tunnel |
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Definition
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Term
| The carpal tunnel encloses what? |
|
Definition
| 9 tendons and the median nerve |
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Term
| The ulnar nerve and artery travel under the _________ but not under the flexor retinaculum |
|
Definition
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Term
| Contents of the carpal tunnel |
|
Definition
4 flexor digitorum superficialis tendons
4 flexor digitorum profundus tendons
1 flexor pollicis longus tendon
Median nerve |
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|
Term
| Components of the palmar radiocarpal ligament |
|
Definition
Radioscapholunate part
Radiocapitate part |
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|
Term
| Components of the palmar ulnocarpal ligament |
|
Definition
Ulnolunate part
Ulnotriquetral part |
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|
Term
| Contents of the radial bursa |
|
Definition
|
|
Term
| Contents of the ulnar bursa |
|
Definition
Flexor digitorum superficialils
Flexor digitorum profundus |
|
|
Term
| Flexor tendon bursae concern |
|
Definition
| infection within a sheath will travel its full length |
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|
Term
Trigger finger:
Repetitive trauma to the FDP/FDS produces _________ and __________ |
|
Definition
-nodules on the tendon
-thickening of the annular pulley |
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|
Term
Trigger finger:
________ displaces swelling in the synovial sheath |
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Definition
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Term
| ________ is limited by the resistance of the swelling to enter the fibrous sheath |
|
Definition
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|
Term
Metacarpal phalangeal joint (MCP):
flexion via _____ |
|
Definition
| Flexor digitorum superficialis and lumbricals |
|
|
Term
Metacarpal phalangeal joint (MCP):
extension via _______ |
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Definition
|
|
Term
| Lumbricals arise from the ___________ |
|
Definition
| flexor digitorum profundus tendons |
|
|
Term
|
Definition
| flex the metacarpal phalangeal joint and extend the proximal interphalangeal and distal interphalangeal joints (through the attachment to the extensor hood mechanism) |
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|
Term
| What muscles assist lumbricals? |
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Definition
|
|
Term
| Dorsal interosseous muscle action |
|
Definition
|
|
Term
| Palmar interosseous muscle action |
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Definition
|
|
Term
| Interosseous muscle innervation |
|
Definition
|
|
Term
| Palmar interossei attachments |
|
Definition
| sides of metacarpals to extensor hood |
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|
Term
| Dorsal interossei attachments |
|
Definition
| sides of metacarpals to extensor hood and proximal phalanx of the thumb |
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Term
|
Definition
| flexor digitorum profundus to extensor hood |
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|
Term
| First carpometacarpal joint (CMC) has what shape? |
|
Definition
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Term
| The unique saddle shaped joint of the first carpometacarpal joint allows for how many degrees of motion? Arthrokinematic motions? |
|
Definition
3 degrees of motion:
abduction/adduction
flexion/extension
opposition |
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|
Term
| Extrinsic thumb muscles and their innervation |
|
Definition
-flexor pollicis longus (median n)
-abductor pollicis longus (radial n)
-extensor pollicis brevis (radial n)
-extensor pollicis longus (radial n) |
|
|
Term
| Intrinsic thumb muscles and their innervation |
|
Definition
-flexor pollicis brevis (median n)
-abductor pollicis brevis (median n)
-opponens pollicis (median n)
-adductor pollicis (ulnar n) |
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|
Term
| Abductor pollicis brevis attachments |
|
Definition
| scaphoid and trapezium to proximal phalanx via radial sesamoid |
|
|
Term
| Adductor pollicis attachments |
|
Definition
transverse head: 3rd metacarpal
oblique head: capitate and 2nd and 3rd metacarpal
to proximal phalanx |
|
|
Term
| Flexor pollicis brevis attachments |
|
Definition
| capitate and trapezium to base of proximal phalanx via radial sesamoid |
|
|
Term
| Opponens pollicis attachments |
|
Definition
| trapezium to 1st metacarpal |
|
|
Term
| Abductor digiti minimi attachments |
|
Definition
| pisiform to 5th proximal phalanx |
|
|
Term
| Flexor digiti minimi brevis attachments |
|
Definition
| hook of hamate to 5th proximal phalanx |
|
|
Term
| Opponens digiti minimi attachments |
|
Definition
| hook of hamate to 5th metacarpal |
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|
Term
| Most thenar and hypothenar muscles have fibers attaching to the _____ |
|
Definition
|
|
Term
| Chief arteries of the hand |
|
Definition
Ulnar artery-> superficial palmar arch
Radial artery-> deep palmar arch |
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|
Term
| What does the ulnar nerve innervate? |
|
Definition
One thenar muscle: adductor pollicis
All hand intrinsics except 2 radial lumbricals |
|
|
Term
| Where is the cutaneous innervation of the ulnar nerve? |
|
Definition
| Lateral side of the hand (half of digit 4) |
|
|
Term
| The ulnar nerve is most commonly injured at what two sites? |
|
Definition
|
|
Term
| Ulnar nerve lesions are characterized by what? |
|
Definition
"clawing" of the hand:
the MCP joints of the fingers are hyperextended and the IP joints are flexed (loss of interosseous muscles) |
|
|
Term
| "clawing" is most pronounced in what fingers and why? |
|
Definition
| medial fingers because the function of all intrinsic muscles of these digits is lost while in the lateral two digits, the lumbricals are innervated by the median nerve |
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