Download MBBS Special class Lecture PPT

Special Anatomy Class
Dr. Partha Sarathi Ain.MD
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Ossification around
elbow and head of
the Humerus.
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Ossification of Carpal
bones (showing palmar
aspect of Right hand)

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Median nerve
through both heads

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of pronator Teres
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Anatomical Snuf box

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ADM, Abductor digiti minimi
APB, abductor pollicis brevis
APL, abductor pollicis longus
ECRB, extensor carpi radialis brevis;
ECRL, extensor carpi radialis longus

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ECU, extensor carpi ulnaris
EDC, extensor digitorum communis;
EDM, extensor digiti minimi;
EPB, extensor pollicis brevis;
EPL, extensor pollicis longus

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FCR, flexor carpi radialis; FCU, flexor carpi ulnaris;
FDP, flexor digitorum profundus;
FDS, flexor digitorum superficialis; FPL, flexor pollicis longus;
C, Capitate; H, hamate; L, lunate; MN, median nerve; OP, oppenens pollicis
P, pisiform; PQ, pronator quadratus; RA, radial artery; S, scaphoid;

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Tq, triquetrum; Tm, trapezium; Td, trapezoid; UA, ulnar artery; UN, ulnar nerve.
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These muscles: are (8)
?They act on the elbow ,
wrist joints and the fingers.
?They form fleshy masses
in the proximal part and

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become tendinous in the
distal part of the forearm.
?They are arranged in three
groups:
I-Superficial: 4

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1. Pronator teres.
2. Flexor carpi radialis.
3. Palmaris longus.
Anterior compartment -FLEXOR GROUP
4. Flexor carpi ulnaris.

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I I- Deep: 3
I -Intermediate: 1
1. Flexor digitorum profundus.
? Flexor digitorum superficialis.
2. Flexor pollicis longus.

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3. Pronator quadratus.
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Superficial layer of forearm

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muscles.
A. Superficial muscles (flexor
retinaculum not shown).
B. Flexor carpi ulnaris muscle.
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Intermediate layer of forearm muscles.
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Deep layer of forearm muscles.
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Superficial layer of muscles in the
posterior compartment of the forearm.
A. Brachioradialis muscle (anterior
view).
B. Superficial muscles (posterior view).

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Deep layer of muscles in the
posterior compartment of the

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forearm.
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Dorsal Extensor Expansion

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It is formed by the union of the tendons of: Extensor digitorum, Extensor indicis,
extensor digiti minimi, palmar & dorsal interossei and lumbricals muscles.
All these tendons unite to form one tendon above the proximal phalanges. Then each
divides into 3 slips, a median one attached to middle phalanges and 2 lateral attached to
the terminal phalanges.

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Dorsal

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Interossei
muscles
Lumbrical
muscles
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Quadrangular Space
The quadrangular space is an intermuscular space, located immediately below the glenohumeral (shoulder) joint
.It is bounded above by the subscapularis and teres minor muscles and the capsule of the shoulder joint and

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below by the teres major muscle. It is bounded medial y by the long head of the triceps and lateral y by the
surgical neck of the humerus. The significance of the quadrangular space is that the axil ary nerve and the
posterior circumflex humeral vessels
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Manifestation of ulnar nerve palsy at or below the wrist are same as the
above except:-
? Adduction and abduction of the wrist wil not be affected.
? The Clawing of ring and little finger becomes more visible.

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? Complete Claw hand occurs in Klumpke's Palsy.
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Middle Radioulnar Joint

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v Joint between shafts of radius & ulna held tightly together
between proximal & distal articulations by an interosseus
membrane (syndesmosis)
v Functions of Interosseus membrane:
D ? distribution of weight / load

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P - partitioning
A ? provides attachment of muscles
T ? transfixing two bones
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Kienbock's disease (Avascular necrosis of Lunate)
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Smith
Colles
fracture
fracture
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