Central Compartment Muscles

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Last updated 7:31 PM on 7/4/26
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12 Terms

1
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Lumbricals 1 and 2 Purposeful Activity

Holding a flat object (book)

2
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Lumbricals 1 and 2 Action

2nd-3rd metacarpophalangeal joints flexion

2nd-3rd finger IP joint extension

3
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Lumbricals 1 and 2 Origin

Lateral two tendons of flexor digitorum profundus

(as unipennate muscles)

4
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Lumbricals 1 and 2 Insertion

Lateral (radial) sides of extensor expansion lateral

band on 2nd & 3rd fingers

5
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Lumbricals 1 and 2

Innervation Median nerve (C8, T1)

6
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Lumbricals 1 and 2 Blood Supply

Superficial palmar arch

7
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Lumbricals 3 and 4 Purposeful Activity

Holding a flat object (book)

8
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Lumbricals 3 and 4 Action

4th-5th metacarpophalangeal joints flexion

4th-5th finger IP joint extension

9
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Lumbricals 3 and 4 Origin

Medial three tendons of flexor digitorum

profundus (as bipennate muscles)

10
New cards

Lumbricals 3 and 4 Insertion

Lateral (radial) sides of extensor expansion lateral

band of 4th & 5th fingers

11
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Lumbricals 3 and 4 Innervation

Deep branch of ulnar nerve (C8, T1)

12
New cards

Lumbricals 3 and 4 Blood Supply

Superficial palmar arch