Quiz 7- Hand & Thumb Actions

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Last updated 4:55 PM on 9/25/26
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13 Terms

1
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MCP Adduction/Abduction

Dorsal Interossei (Abduction)
Palmar Interossei (Adduction)

2
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Gross Grasp Flexion (Digits 2-5)

Flexor digitorum superficialis (PIPs, MCP)
Flexor digitorum profundus (DIP, PIP, MCP)
Flexor digitorum brevis (5th finger, MCP only, not IPs)
Lumbricals (MCP)

3
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Gross Extension (Digits 2-5)

Extensor Digitorum (MCP, PIP, DIP)
Extensor indices (Index finger IP & MCP)
Extensor digiti minimi (5th finger, IP & MCP)

4
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Flexion of MCP plus extension of PIP and DIP (intrinsic plus position)

Lumbricals

5
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Thumb CMC Flexion

Flexor pollicis longus
Flexor pollicis brevis

6
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Thumb CMC Extension

Extensor pollicis longus
Extensor pollicis brevis

7
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Thumb CMC Palmar Abduction

Abductor pollicis longus
Abductor pollicis brevis

8
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Thumb CMC Radial Abduction

Abductor pollicis longus
Abductor pollicis brevis

9
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Thumb CMC Adduction

Adductor pollicis

10
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Thumb MCP Flexion

Flexor pollicis longus
Flexor pollicis brevis

11
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Thumb MCP/IP Extension

Extensor pollicis longus
Extensor pollicis brevis

12
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Thumb IP Flexion

Flexor pollicis longus

13
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Thumb and 5th finger Opposition

Opponens pollicis
Opponens digiti minimi