Term
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Definition
| Movement of the thumb toward the fifth digit in a plane parallel to the palm (frontal plane movement) |
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Term
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Definition
| Movement of the thumb away from the fifth digit in a plane parallel to the palm (frontal plane movement) |
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Term
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Definition
| Movement of the thumb away from the palm in a plane perpendicular to the palm (sagittal plane movement) |
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Term
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Definition
| Movement of the thumb toward the palm in a plane perpendicular to the palm (sagittal plane movement) |
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Term
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Definition
| Combination of flexion and abduction to produce a movement where the tip of the 1st and 5th digits touch |
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Term
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Definition
| Bending the MCP joint so the anterior surface of the proximal phalanx moves closer to the palm |
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Term
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Definition
| Straightening of the MCP joint so that the anterior surface of the proximal phalanx moves away from the palm |
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Term
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Definition
| Bending of the IP joint so that the anterior surface of the distal phalanx moves toward the anterior surface of the proximal phalanx |
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Term
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Definition
| Straightening of the IP joint so that the anterior surface of the distal phalanx moves away from the anterior surface of the proximal phalanx |
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Term
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Definition
trapezium - MC 1
trapezoid - MC 2
capitate - MC 3
hamate - MC 4&5 |
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Term
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Definition
| Occurs when the second, fourth, and fifth fingers move away from the third digit, OR when the third digit moves in either direction |
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Term
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Definition
| Occurs when the second, fourth and fifth fingers move back toward the third digit. There is no adduction for the middle finger |
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Term
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Definition
| bending / straightening occurring between the proximal and middle phalanges |
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Term
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Definition
| bending / straightening occurring between the middle and distal phalanges |
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Term
| Extrinsic muscles originate... |
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Definition
| outside (proximal) the hand, radius, ulna, or humerus |
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Term
| Flexor Digitorum Superficialis OIA |
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Definition
O: medial epicondyle of the humerus at the common flexor tendon, coronoid process of the ulna, and proximal anterior radius
I: tendons split and insert on the sides of the middle phalanges of digits 2-5
A: PIP flexion digits 2-5,
MCP flexion digits 2-5,
assists wrist flexion |
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Term
| Flexor Digitorum Profundus OIA |
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Definition
O: Upper 3/4 of ulna
I: Distal phalanges of digits 2-5, running through the split in the FDS tendon along the way
A: DIP flexion digits 2-5,
PIP flexion digits 2-5,
MCP flexion digits 2-5,
assists wrist flexion |
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Term
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Definition
O: lateral epicondyle of humerus at the common extensor tendon
I: bases of distal phalanges 2-5
A: DIP extension digits 2-5,
PIP extension digits 2-5,
MCP extension digits 2-5,
assists wrist extension |
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Term
| Extensor Expansion Ligament / Extensor Hood |
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Definition
| an extension of the extensor digitorum tendon, which turns into a small triangular shaped aponeurosis, serves as an attachment point for the lumbricales and Interossei and allows them to impart action on the DIP joint |
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Term
| Extensor Digiti Minimi OIA |
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Definition
O: lateral epicondyle of humerus at the common extensor tendon
I: base of the distal phalanx of digit 5
A: DIP extension digit 5,
PIP extension digit 5,
MCP extension digit 5 |
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Term
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Definition
O: distal ulna
I: base of distal phalanx of digit 2
A: DIP extension digit 2,
PIP extension digit 2,
MCP extension digit 2 |
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Term
| Extrinsic muscles of the thumb |
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Definition
Anterior: Flexor Pollicis Longus
Posterior: Abductor Pollicis Longus,
Extensor Pollicis Brevis,
Extensor Pollicis Longus |
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Term
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Definition
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Term
| Flexor Pollicis Longus OIA |
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Definition
O: anterior radius
I: distal phalanx of digit 1
A: IP flexion digit 1,
MCP flexion digit 1,
CMC flexion digit 1 |
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Term
Abductor Pollicis Longus OIA
(exception to longus rule) |
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Definition
O: posterior radius, interosseous membrane, and middle ulna
I: base of first metacarpal
A: CMC abduction digit 1 |
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Term
| Extensor Pollicis Longus OIA |
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Definition
O: middle posterior ulna and interosseous membrane
I: base distal phalanx of the thumb
A: IP extension digit 1,
MCP extension digit 1,
CMC extension digit 1 |
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Term
| Extensor Pollicis Brevis OIA |
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Definition
O: posterior distal radius
I: base of the proximal phalanx of the thumb
A: MCP extension digit 1,
CMC extension digit 1 |
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