Term
| What intrinsic muscles are innervated by the median nerve? |
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Definition
ABductor pollicis brevis
Opponens pollicis
Flexor pollicis brevis
Lumbricals (radial side) |
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Term
| ABductor pollicis brevis (origin, insertion, function) |
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Definition
| [image]
origin: scaphoid, trapezium, flexor retinaculum, and tendon of the ABductor pollicis longus
insertion: base of proximal phalanx, radial side of thumb
function: palmar ABduction |
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Term
| Opponens pollicis (origin, insertion, function) |
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Definition
| [image]
origin: trapezium and flexor retinaculum
insertion: 1st metacarpal
function: opposition |
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Term
| Flexor pollicis brevis (origin, insertion, function) |
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Definition
| [image]
origin: trapezium, trapezoid, capitate, and flexor retinaculum
insertion: base of proximal phalanx, radial side of thumb
function: thumb MCP flexion, deep head innervated by ulnar nerve |
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Term
| Lumbricals (origin, insertion, function) |
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Definition
| [image]
origin: tendons of flexor digitorum profundus, index and middle fingers (radial and palmar sides)
insertion: radial side of digits II and III into extensor expansion
function: MCP flexion and IP extension |
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Term
| What intrinsic muscles are innervated by the ulnar nerve? |
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Definition
ABductor digiti minimi
Opponens digiti minimi
Flexor digiti minimi
Lumbricals (ulnar side)
Palmar interossei
Dorsal interossei |
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Term
| ABductor digiti minimi (origin, insertion, function) |
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Definition
| [image]
origin: pisiform and tendon of flexor carpi ulnaris
insertion: proximal phalanx of the 5th digit
function: ABduction of the 5th digit |
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Term
| Opponens digiti minimi (origin, insertion, function) |
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Definition
| [image]
origin: hook of hamate and flexor retinaculum
insertion: 5th metacarpal
function: opposition of 5th digit |
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Term
| Flexor digiti minimi (origin, insertion, function) |
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Definition
| [image]
origin: hook of hamate and flexor retinaculum
insertion: proximal phalanx of 5th digit
function: flexion of MCP joint and opposition of 5th digit |
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Term
| Palmar interossei (origin, insertion, function) |
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Definition
| [image]
origin:
1st palmar= ulnar surface of 2nd metacarpal.
2nd palmar= radial surface of 4th metacarpal.
3rd palmar= radial surface of 5th metacarpal.
insertion:
1st palmar= ulnar surface of 2nd proximal phalanx.
2nd palmar= radial surface of 4th proximal phalanx.
3rd palmar=radial surface of 5th proximal phalanx.
function: ADduction and assistance with MCP flexion and extension of IP joints of digits II through V |
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Term
| Dorsal interossei (origin, insertion, function) |
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Definition
| [image]
origin: all 4 arise from adjacent sides of the metacarpals
insertion: proximal phalanx ont he radial aspect of the index, radial and ulnar sides of the middle, and ulnar side of rign finger (all into extensor digitorum)
function: ABduction and assists with MCP flexion and extension of IP joints of digits II through V |
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Term
| What extrinsic flexor muscles are innervated by the median nerve? |
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Definition
Flexor digitorum superficialis (FDS)
Flexor digitorum profundus (FDP)
Flexor pollicis longus (FPL) |
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Term
| Flexor digitorum superficialis (FDS) (origin, insertion, function) |
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Definition
| [image]
origin: medial epicondyle
insertion: middle phalanx (2 slips)
function: flexion of PIP joints |
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Term
| Flexor digitorum profundus (FDP) (origin, insertion, function) |
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Definition
| [image]
origin: proximal 2/3 of ulna and interosseous membrane
insertion: distal phalanx
function: flexion of DIP joints to digits II through V |
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Term
| Flexor pollicis longus (FPL) (origin, insertion, function) |
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Definition
| [image]
origin: radium, middle 1/3
insertion: distal phalanx of thumb
function: flexion of IP joint of thumb |
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Term
| What extrinsic flexors are innervated by the ulnar nerve? |
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Definition
| Flexor digitorum profundus (FDP) |
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Term
| What extrinsic extensor muscles are innervated by the radial nerve? |
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Definition
Extensor digitorum communis (EDC)
Extensor digniti minimi (EDM)
Extensor indidicis proprius (EIP)
Extensor pollicis longus (EPL)
Extensor pollicis brevis (EPB)
ABductor pollicis longus (APL) |
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Term
| extensor digitorum communis (EDC) (origin, insertion, function) |
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Definition
| [image]
origin: lateral epicondyle
insertion: medial band to middle phalanx and lateral band to distal phalanx
function: extension of MCPs and contributes to extension of IPs |
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Term
| extensor digiti minimi (EDM) (origin, insertion, function) |
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Definition
| [image]
origin: lateral epicondyle
insertion: EDC at MCP level of 5th digit
function: extension of MCP of 5th and contributes to extension of IPs |
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Term
| extensor indicis proprius (EIP) (origin, insertion, function) |
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Definition
| [image]
origin: ulna, middle 1/3
insertion: inerts into EDC at MCP level
function: extension of MCP of 2nd digit and contributes to extension of IP joints |
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Term
| Extensor pollicis longus (EPL) (origin, insertion, function) |
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Definition
| [image]
origin: ulna, middle 1/3
insertion: distal phalanx of thumb
function: extension of IP joint of thumb |
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Term
| extensor pollicis brevis (EPB) (origin, insertion, function) |
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Definition
| [image]
origin: radius, middle 1/3
insertion: proximal phalanx of thumb
function: extension of MCP and CMC of thumb |
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Term
| ABductor pollicis longus (APL) (origin, insertion, function) |
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Definition
| [image]
origin: middle 1/3 of ulna and radius
insertion: 1st MCP, radial side
function: ABduction and extenion of CMC |
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