Intrinsic Hand Lab Study Guide

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Description and Tags

Vocabulary flashcards reviewing hand joint motions, muscle classifications (intrinsic vs. extrinsic), innervations, spinal root levels, and actions based on the Intrinsic Hand Lab Study Guide.

31 Terms

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Thumb CMC Joint Actions

Abduction, Adduction, Extension, Flexion, Opposition

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Thumb MCP Joint Actions

Abduction, Adduction, Extension, Flexion, Assists Opposition

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Thumb IP Joint Actions

Extension & Flexion

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Finger MCP Joint Actions

Abduction, Adduction, Extension, Flexion, Circumduction

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Finger PIP Joint Actions

Extension, Flexion

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Finger DIP Joint Actions

Extension, Flexion

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Thenar Muscles

Primary thumb movers

  1. Abductor Pollicis Brevis

  2. Flexor Pollicis Brevis

  3. Opponens Pollicis

  4. Adductor Pollicis


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Hypothenar Muscles

Small Finger Movers

  1. Opponens Digiti Minimi

  2. Abductor Digit Minimi

  3. Flexor Digiti Minimi Brevis


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Interossei Muscles

Muscles responsible for MCP Abd/Adduction

  1. Palmar Interossei

  2. Dorsal Interossei


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Lumbrical Muscles (General Function)

Intrinsic Plus Position

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A hand position produced by the lumbricals consisting of MCP flexion combined with PIP and DIP extension of all four fingers

Intrinsic Plus Position

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Extensor Pollicis Longus

Extrinsic

Extension

Radial C6, C7, C8

<p>Extrinsic</p><p>Extension </p><p>Radial C6, C7, C8 </p>
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Extensor Pollicis Brevis

Extrinsic

Radial C6, C7

Extension

<p>Extrinsic</p><p>Radial C6, C7</p><p>Extension</p>
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Abductor Pollicis Longus

Extrinsic

Radial C6, C7, C8

Abduction & Extension

<p>Extrinsic</p><p>Radial C6, C7, C8</p><p>Abduction &amp; Extension</p>
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Flexor Pollicis Longus

Extrinsic

Median C7, C8, T1

Abduction & Flexion

<p>Extrinsic</p><p>Median C7, C8, T1</p><p>Abduction &amp; Flexion</p>
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Flexor Pollicis Brevis

Intrinsic

Median & Ulnar C6, C7, C8, T1

Abduction, Flexion, and Assists Opposition

<p>Intrinsic</p><p>Median &amp; Ulnar C6, C7, C8, T1</p><p>Abduction, Flexion, and Assists Opposition</p>
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Abductor Pollicis Brevis

Intrinsic

Median C6, C7, C8, T1

Abduction & Assists Opposition

<p>Intrinsic</p><p>Median C6, C7, C8, T1</p><p>Abduction &amp; Assists Opposition</p>
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Opponens Pollicis

Intrinsic

Median C6, C7, C8, T1

Opposition

<p>Intrinsic</p><p>Median C6, C7, C8, T1</p><p>Opposition</p>
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Adductor Pollicis

Intrinsic

Ulnar nerve C8, T1

Adduction & Flexion

<p>Intrinsic </p><p>Ulnar nerve C8, T1</p><p>Adduction &amp; Flexion</p>
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Extensor Indicis

Extrinsic

Radial C6, C7, C8

Adduction & Extension

<p>Extrinsic</p><p>Radial C6, C7, C8</p><p>Adduction &amp; Extension</p>
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Extensor Digiti Minimi

Extrinsic

Radial C6, C7, C8

Extension

<p>Extrinsic</p><p>Radial C6, C7, C8</p><p>Extension</p>
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Extensor Digitorum (Communis)

Extrinsic

Radial C6, C7, C8

Abduction & Extension

<p>Extrinsic</p><p>Radial C6, C7, C8</p><p>Abduction &amp; Extension</p>
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Flexor Digitorum Superficialis

Extrinsic

Median C7, C8, T1

Flexion

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Flexor Digitorum Profundus

Extrinsic

Median & Ulnar C7, C8, T1

Flexion

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Lumbricals 1 & 2

Intrinsic

Median C6, C7, C8, T1

Extension & Flexion

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Lumbricals 3 & 4

Intrinsic

Ulnar C7, C8, T1

Extension & Flexion

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Flexor Digiti Minimi Brevis

Intrinsic

Ulnar C7, C8, T1

Flexion & Assists Opposition

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Abductor Digiti Minimi

Intrinsic

Ulnar C7, C8, T1

Abduction & Assists Opposition

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Opponens Digiti Minimi

Intrinsic

Ulnar C7, C8, T1

Opposition

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Dorsal Interossei

Intrinsic

Ulnar C8, T1

Abduction, Adduction, Extension, Flexion

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Palmar Interossei

Intrinsic

Ulnar C8, T1

Adduction, Extension, Flexion