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Anatomy > Hand > Flashcards

Hand Flashcards

1
Q

Thenar muscles (4)

A

Abductor Pol Brev
Opponens Pol
Flexor pol brev
Adductor pol

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2
Q

Hypothenar muscles (4)

A

Palmaris Brevis
Abductor digiti minimi
Flexor digiti minimi brevis
Opponens digiti minimi

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3
Q

Intrinsic hand muscles (3)

A

Lumbricals
Dorsal interosseous
Volatile interosseous

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4
Q

1st dorsal compartment (2)

A

Abductor pollicis longus
Extensor pollicis brevis

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5
Q

2nd dorsal compartment (2)

A

Extensor carpi radialis longus (ECRL)
Extensor carpi radialis brevis (ECRB)

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6
Q

3rd dorsal compartment (1)

A

Extensor pollicis longus (EPL)

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7
Q

4th dorsal compartment (2)

A

Extensor digitorum communis (EDC)
Extensor indicis propius (EIP)

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8
Q

5th dorsal compartment (1)

A

Extensor digiti minimi (EDM)

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9
Q

6th dorsal compartment (1)

A

Extensor carpi ulnaris (ECU)

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10
Q

1DC: Anatomic considerations (2)

A

EPB tendon is ulnar to abductor PL (APL)
APL may have multiple tendon slips, which should be addressed for release of…

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11
Q

1DC pathology

A

Duquervain tenosynovitis

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12
Q

2DC pathology

A

Extensor tendinitis (intersection syndrome)

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13
Q

3DC pathology (2)

A

EPL rupture at Lister’s after wrist fx
Drummer’s tendinitis of the wrist

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14
Q

4DC pathology

A

Extensor tenosynovitis

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15
Q

5DC pathology

A

Vaughn-Jackson syndrome (RA; rupture of EDM)

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16
Q

6DC pathology

A

Snapping at ulnar styloid

17
Q

Abd pol brev

Origin
Insertion
Action
Innervation

A

Origin: Scahpoid, trapezoid

Insertion: base of proximal phalanx, radial side

Action: abducts thumb

Innervation: median nerve

18
Q

Opponens pollicis

Origin
Insertion
Action
Innervation

A

Origin: trapezium

Insertion: thumb metacarpal

Action: abduction, flexion, medial rotation

Innervation: median nerve

19
Q

Flexor pollicis brevis

Origin
Insertion
Action
Innervation

A

Origin: Trapezium, capitate

Insertion: base of thumb P1, radial side

Action: thumb MCP flexion

Innervation: median, ulnar

20
Q

Adductor pollicis

Origin
Insertion
Action
Innervation

A

Origin: Capitate, second/third metacarpals

Insertion: base of thumb P1, ulnar side

Action: adduct thumb

Innervation: ulnar nerve

21
Q

Palmaris brevis

Origin
Insertion
Action
Innervation

A

Origin: TCL, palmar aponeurosis

Insertion: ulnar palm

Action: retract skin

Innervation: ulnar nerve

22
Q

Abductor digiti minimi

Origin
Insertion
Action
Innervation

A

Origin: Pisiform

Insertion: base of SF P1, ulnar side

Action: abduct SF

Innervation: ulnar nerve

23
Q

Flexor digiti minimi brevis

Origin
Insertion
Action
Innervation

A

Origin: Hamate, TCL

Insertion: Base of SF P1, ulnar side

Action: Flex SF MCP

Innervation: Ulnar nerve

24
Q

“Hand” muscles are grouped into (3)

A

Thenar
Hypothenar
Intrinsic

25
Q

Opponens digiti minimi

Origin
Insertion
Action
Innervation

A

Origin: Hamate, TCL

Insertion: SF MC

Action: Abduct, flex, rotate laterally

Innervation: Ulnar nerve

26
Q

Lumbricals

Origin
Insertion
Action
Innervation

A

Origin: Flexor digitorum profundus

Insertion: Lateral bands (radial)

Action: PIP extension

Innervation: median and ulnar nerves

27
Q

Dorsal and volar interossei

Origin
Insertion
Action
Innervation

A

Origin: Adjacent metacarpals

Insertion: base of P1/extensor apparatus

Action: Volar: adduction and MCP flexion, Dorsal: abduction and MCP flexion

Innervation: Ulnar nerve

28
Q

Four components of hand extensor mechanism

A

Saggital bands
Transverse bands
Lateral bands
Oblique retinacular ligament (Landsmeer)

29
Q

Saggital bands

Attachments
Significance

A

Attachments: Covers MCP joint

Significance: Allows MCP extension

30
Q

Transverse ligament of extensor apparatus

Attachments
Significance

A

Attachments: Volar plate fibers

Significance: Allows MCP flexion (interossei)

31
Q

Lateral bands

Attachments
Significance

A

Attachments: Covers PIP

Significance: allows PIP extension (Lumbricals)

32
Q

Oblique retinacular ligament (Landsmeer)

Attachments
Significance

A

Attachments: A4 pulley, terminal tendon

Significance: Allows DIP extension (passive)

33
Q

Carpal tunnel borders (4)

Roof
Floor
Radial
Ulnar

A

Roof: TCL

Floor: Carpal bones

Radial: Scaphoid tubercle/trapezium

Ulnar: Hook of hamate

34
Q

5 Superficial flexors, innervation?

A

PT
PL
FCR
FCU
FDS

All median nerve except FCU (ulnar)

35
Q

3 Deep flexors, innervation?

A

FDP
FPL
PQ

AIN

36
Q

7 Superficial extensors

A

Anconeus
BR
ECU
ECR L
ECR B
ED
EDM

37
Q

5 Deep extensors, innervation?

A

Supinator

Abductor pollicis longus

Extensor pollicis longus

Extensor pollicis brevis

Extensor indicis proprius

ALL PIN

Anatomy (1 decks)

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