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Hand • Bones • Joints • Muscles • Vessels & Nerves 1

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Page 1: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Hand

• Bones• Joints• Muscles• Vessels & Nerves

Page 2: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Muscles of the hand

• Extrinsic muscles- flexors of fingers- extensors of fingers- long muscles of the thumb

• Intrinsic muscles- thenar region - hypothenar region - intermediate region

Page 3: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Extrinsic muscles

• flexors of fingers:- Flexor digitorum superficialis- Flexor digitorum profundus

• extensors of fingers:- Extensor digitorum- Extensor digiti minimi- Extensor indicis

• long muscles of the thumb:- Flexor pollicis longus

- Abductor pollicis longus - Extensor pollicis brevis - Extensor pollicis longus

Page 4: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Intrinsic muscles

• Thenar region:- Abductor pollicis brevis - Flexor pollicis brevis - Opponens pollicis

• Hypothenar region:- Abductor digiti minimi - Flexor digiti minimi brevis - Opponens digiti minimi

• Intermediate region:- Lumbricals

- Adductor pollicis- Interossei

Page 5: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Extrinsic muscles (flexors)

Page 6: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Long flexors of fingers

Page 7: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Flexor tendon insertion

Action:flexion in MP&IP jointsHow can we flex just MP?

Page 8: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Muscles of the Anterior Compartment of the Forearm

• Superficial:

Pronator TeresFlexor Carpi RadialisPalmaris Longus Flexor Digitorum SuperficialisFlexor Carpi Ulnaris

• Superficial:

Pronator TeresFlexor Carpi RadialisPalmaris Longus Flexor Digitorum SuperficialisFlexor Carpi Ulnaris

• Deep:

Flexor Digitorum ProfondusFlexor Pollicis LongusPronator Quadratus

Page 9: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Extrinsic muscles (extensors)

Page 10: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Extrinsic muscles

Page 11: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Anatomic snuffbox

Page 12: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Anatomic Snuffbox

• Extensor pollicis brevis/Abductor pollicis longus

• Extensor pollicis longus• Scaphoid• Radial a

Page 13: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Extensor tendon insertion

Page 14: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Post.Compartment m.Superficial:Brachioradialis

Extensor Carpi Radialis Longus

Extensor Carpi Radialis Brevis

Extensor Digitorum

Extensor Digiti Minimi

Extensor Carpi Ulnaris

Anconeus

Deep:Supinator

Abductor Pollicis Longus

Extensor Pollicis Brevis

Extensor Pollicis Longus

Extensor Indicis

Page 15: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Intrinsic muscles

• Thenar region:- Abductor pollicis brevis - Flexor pollicis brevis - Opponens pollicis

• Hypothenar region:- Abductor digiti minimi - Flexor digiti minimi brevis - Opponens digiti minimi

• Intermediate region:- Lumbricals

- Adductor pollicis- Interossei

Page 16: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Intrinsic muscles

Page 17: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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origin:1. flex. retinaculum

Insertion:1- deep attaches to Metacarpal2- superficial to P. Phalanx

henar & hypothenar muscles

Page 18: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Trap. tubercle

Scapho. tubercle

Pisifo.

Ham. hook

2. Origin of thenar & hypothenar muscles

thenar & hypothenar muscles

Page 19: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Intrinsic muscles

• Thenar region:- Abductor pollicis brevis - Flexor pollicis brevis - Opponens pollicis

• Hypothenar region:- Abductor digiti minimi - Flexor digiti minimi brevis - Opponens digiti minimi

• Intermediate region:- Adductor pollicis-Lumbricals

-Interossei

Page 20: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Intermediate regionAdductor pollicis

Page 21: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Function: Dab

Intermediate regionDorsal Interossei

Page 22: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Function: Pad

Intermediate regionPalmar Interossei

Page 23: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Function: MP flex. !

Intermediate regionlumbricals

Page 24: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Intermediate region muscles insertion: Extensor hood

Page 25: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Page 26: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Extensor & flexor mechanism

Page 27: Hand Bones Joints Muscles Vessels & Nerves 1. Muscles of the hand Extrinsic muscles - flexors of fingers - extensors of fingers - long muscles of the

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Tendon insertion

Action:•pad/dab•Flexion in MP and extension in IP joints

How can we flex just MP?

Function: MP flex.


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