The Hand

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Question

Answer

Arches of the palm (cupped position)

Proximal carpal arch Distal Carpal Arch Longitudinal Arch

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Extensor Hood is known as

Extensor Expansion Ligament

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Extrinsic Muscles of the Hand- primary function is at thumb or finger

Flexor Digitorum Superficiallis/Profundus Flexor pollicies Longus Abductor Pollicis Longus Extensor pollicis Longus/Brevis Extensor Digitorium Extensor Indicis Extensor DIgiti Mininmi

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Extensor digitorum blends in and keeps

the extensor tendon in the midline

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Carpal Tunnel

Transverse Carpal Ligament

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Anatomical SnuffBox

Abbductor pollicis longus Extensor pollicis brevis Extensor Pollicis Longus

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Flexor Digitorum Superficialis

Divides into 4 tendons as it crosses the wrist then each splits into 2 parts

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Flexor Digitorum Profundus

Splits into 4 tendons as it crosses the wrist (only muscle to flex the DIP Joints)

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Intrinsic Muscles responsible for fine motor control

Thenar and Hypothenar

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Thenar muscle form thenar eminence=moves thumb

F lexor Pollicis Brevis A bductor Pollicis Brevis O pponens Pollicis

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Hypothenar form hypothenar eminence=works primarily on pinkie

F lexor Digiti Minimi A bductor Digiti Minimi O pponens Digiti Minimi

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Deep Palm Muscles

A dductor Pollicis I nterossei L umbricales

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Table Top finger aka

Lumbricales

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Power GRips

Cynlindrical grip Spherical Grip Hook Grip

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Precision Grips

Pad to Pad Grip Pinch Grip Three-Jaw Chuck Tip to Tip Grip Pincer Grip Pad-to-side Grip Side-to-side Grip Lumbrical Grip or Plate Grip

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power grip examples

hammer, door knob

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precision examples

needle

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Pinch Grip

coin with two fingers

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Tripod Grip or Three Jaw Grip

Pencil or Pen

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Side to Side

Cigarette

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Pad to side grip

key to lock

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Lumbrical Grip

Holding plate

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De Quervains Disease

Inflammation and thickening of sheath resulting in pain on the radial side of wrist

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Tenosynovitis

inflammation of tendons and surrounding sheaths

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Dupuytren's Contracture

palmar aponeurosis undergoes a nodula thickening

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Stenosing Tenosynovitis (trigger finger)

problem with sliding tendon and sheath

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Skiers Thumb

common hand injury among athletes involve an acute tear of the ulnar collateral ligament of thumb

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Gamekeepers Thumb

stretching injury of the same ligament

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schaphoid fracture

fall on the outstretched hand of a younger person

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Kienbocks disease

necrosis of the lunate, may develop after trauma

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