| Term | Definition |
|---|
| Abductor Pollicis Brevis - Proximal Attachment | Flexor Retinaculum, Scaphoid (Tubercle), Trapezium (Tubercle) |
| Thenar Muscles | Abductor Pollicis Brevis, Flexor Pollicis Brevis, Opponens Pollicis, Adductor Pollicis |
| Abductor Pollicis Brevis - Distal Attachment | Thumb - Proximal Phalanx - Base |
| Abductor Pollicis Brevis - Innervation | Recurrent Branch of Median Nerve |
| Abductor Pollicis Brevis - Action | Thumb CMC Joint Abduction, Thumb Opposition |
| Flexor Pollicis Brevis - Proximal Attachment | Flexor Retinaculum, Scaphoid (Tubercle), Trapezium (Tubercle) |
| Flexor Pollicis Brevis - Distal Attachment | Thumb - Proximal Phalanx - Base |
| Flexor Pollicis Brevis - Innervation | Recurrent Branch of Median Nerve, Deep Branch of Ulnar Nerve |
| Flexor Pollicis Brevis - Action | Thumb MCP & CMC Joint Flexion, Thumb Opposition |
| Opponens Pollicis - Proximal Attachment | Flexor Retinaculum, Scaphoid (Tubercle), Trapezium (Tubercle) |
| Opponens Pollicis - Distal Attachment | 1st Metacarpal (Lateral Border) |
| Opponens Pollicis - Innervation | Recurrent Branch of Median Nerve |
| Opponens Pollicis - Action | Thumb Opposition |
| Adductor Pollicis - Proximal Attachment | Oblique Head: 2nd & 3rd Metacarpals (Bases), Capitate & Adjacent Carpals, Transverse Head: 3rd Metacarpal - Anterior Surface |
| Adductor Pollicis - Distal Attachment | Thumb - Proximal Phalanx - Base |
| Adductor Pollicis - Innervation | Deep Branch of Ulnar Nerve |
| Adductor Pollicis - Action | Thumb CMC Joint Adduction |
| Abductor Digiti Minimi - Proximal Attachment | Pisiform |
| Abductor Digiti Minimi - Distal Attachment | 5th Digit - Proximal Phalanx - Base |
| Abductor Digiti Minimi - Innervation | Deep Branch of Ulnar Nerve |
| Abductor Digiti Minimi - Action | 5th Digit MCP Joint Abduction |
| Flexor Digiti Minimi Brevis - Proximal Attachment | Hamate (Hook), Flexor Retinaculum |
| Flexor Digiti Minimi Brevis - Distal Attachment | 5th Digit - Proximal Phalanx - Base |
| Flexor Digiti Minimi Brevis - Innervation | Deep Branch of Ulnar Nerve |
| Flexor Digiti Minimi Brevis - Action | 5th Digit MCP Joint Flexion |
| Opponens Digiti Minimi - Proximal Attachment | Hamate (Hook), Flexor Retinaculum |
| Opponens Digiti Minimi - Distal Attachment | 5th Metacarpal - Medial Border |
| Opponens Digiti Minimi - Innervation | Deep Branch of Ulnar Nerve |
| Opponens Digiti Minimi - Action | 5th Digit Opposition |
| Hypothenar Muscles | Abductor Digit Minimi, Flexor Digiti Minimi Brevis, Opponens Digiti Minimi |
| Short Muscles | Lumbricals 1-2 (Unipennate Muscles), Lumbricals 3-4 (Bipennate Muscles), Dorsal Interossei 1-4 (Bipennate Muscles), Palmar Interossei 1-3 (Unipennate Muscles) |
| Lumbricals 1-2 (Unipennate Muscles) - Proximal Attachment | Flexor Digitorum Profundus - Lateral 2 Tendons |
| Lumbricals 1-2 (Unipennate Muscles) - Distal Attachment | 2nd & 3rd Digits - Extensor Expansions - Lateral Bands |
| Lumbricals 1-2 (Unipennate Muscles) - Innervation | Lateral & Medial Branches of Median Nerve |
| Lumbricals 1-2 (Unipennate Muscles) - Action | 2nd & 3rd Digit MCP Joint Flexion & IP Joint Extension |
| Lumbricals 3-4 (Bipennate Muscles) - Proximal Attachment | Flexor Digitorum Profundus - Medial 3 Tendons |
| Lumbricals 3-4 (Bipennate Muscles) - Distal Attachment | 4th & 5th Digits - Extensor Expansions - Lateral Bands |
| Lumbricals 3-4 (Bipennate Muscles) - Innervation | Deep Branch of Ulnar Nerve |
| Lumbricals 3-4 (Bipennate Muscles) - Action | 4th & 5th Digit MCP Joint Flexion & IP Joint Extension |
| Dorsal Interossei 1-4 (Bipennate Muscles) - Proximal Attachment | Adjacent Sides of Two Metacarpals |
| Dorsal Interossei 1-4 (Bipennate Muscles) - Distal Attachment | 2nd-4th Digits - Extensor Expansions - Lateral Bands, Proximal Phalanges - Bases |
| Dorsal Interossei 1-4 (Bipennate Muscles) - Innervation | Deep Branch of Ulnar Nerve |
| Dorsal Interossei 1-4 (Bipennate Muscles) - Action | 2nd-4th Digit Abduction from Axial Line, Assists Lumbricals in Medial 4 Digit MCP Joint Fleixon & IP Joint Extension |
| Palmar Interossei 1-3 (Unipennate Muscles) - Proximal Attachment | 2nd, 4th, & 5th Metacarpals - Palmar Surfaces |
| Palmar Interossei 1-3 (Unipennate Muscles) - Distal Attachment | 2nd, 4th, & 5th Digits - Extensor Expansions - Lateral Bands, Proximal Phalanges - Bases |
| Palmar Interossei 1-3 (Unipennate Muscles) - Innervation | Deep Branch of Ulnar Nerve |
| Palmar Interossei 1-3 (Unipennate Muscles) - Action | 2nd, 4th, & 5th Digit Adduction Toward Axial Line, Assists Lumbricals in Medial 4 Digit MCP Joint Flexion & IP Joint Extension |
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