Download the elbow joint

AXILLARY
Lie on the medial
side of the artery.
formed from the
venae comitantes
to the brachial a.
strongly
reinforced above
by the basilic
vein.
VEIN
MUSCULOCUTANEOUS N.arm
From lat. Cord of the brachial plexus
C5,6&7.passes between biceps &brachialis
appear at the lateral margin of the biceps
tendon &pierce the deep fascia above the
elbow ,it run down the lateral aspect of the
forearm as the lateral cut.n. of the arm.
Branches:
1-Mscular;biceps,brachialis&coracobrachialis
ms.
2-Cutaneous;lat.cut n. of the forearm.
3-Articular;elbow joint.
MEDIAN
NERVE arm
From medial&lateral
cords of the brachial
plexuses .
Run down word lat. to
the brachial a.half way
down the arm it
crosses the brachial
a.&continue on the
medial side .
At the elbow it is
crossed by the
bicipital aponeurosis.
Branches;
No branches above the
elbow ,except small
vasomotor n to the
brachial a.
ULNAR NERVE arm
From medial cord of the
brachial plexuses run
downward on the medial
side of the brachial a.
As far as middle of the arm
,the nerve pierces the
medial fascial septum
accompained by the
sup.ulnar collateral a.
&enter the
post.compartment of the
arm.
Branches;
No branches above the
elbow.
RADIAL NERVE arm
Enter the anterior
compartment just
above the lateral
epicondyle of the
humerus.
Braches IN
ANT.COMP.OF ARM;
Brachialis
,brachioradialis
&extensor carpi
radialis longus ms.
Articular branch to the
elbow
CONTENTSOF
POSTERIOR
COMPARTMENT
M:
TRICEPS M.
N:
RADIAL N.
A:
PROFUNDA
BRACHII&ULNAR
COLLATERAL A.
STRACTURES PASS THROUGH;
Ulnar n.
TRICEPS M.
ORIGIN;
long head; infraglenoid tubercle of
scapula.
lateral head;upper surface of
humeral shaft above spiral
groove.
Medial head; lower half of
posterior surface of humeral
shaft below spiral groove.
INSERTION;the common tendon is
inserted into the upper surface
of the olecranon processof the
ulna.
NERVE SUPPLY; radial n.
ACTION; extension of the elbow.
PROFUNDA BRACHII
Arise from the
brachial a.near its
origin.it
accompanies the
radial n.through the
spiral groove
Branches;
*Muscular; triceps m.
*Take part in
anastomosis around
the elbow joint.
RADIAL NERVE
Originate from post. cord of brachial
plexus.
the nerve winds around the back of the
arm,first between the long&medial
head of triceps ,then in the spiral
groove on the back of the humerus
between lateral&medial head of
triceps.
It pierece the lateral fascial septum above
the elbow &contineu down ward in the
cubital fossa betweeen the
brachialis&brachioradialis ms.
Enter the anterior compartment just above
the lateral epicondyle of the humerus
RADIAL NERVE
BRANCHES;
IN AXILLA;
long&med.head of triceps.
Post. Cut. N. of the arm.
IN SPIRAL GROOVE;
Lat.&med.head of triceps
Post. Cut. N. of the arm
IN ANT.COMP.OF ARM;
Brachialis ,brachioradialis
&extensor carpi radialis
longus ms.
Articular branch to the
elbow.
ULNAR NERVE
At the elbow it lies behind
the medial epicondyle of
the humerus.it contineu
downward to enter the
forearm between the two
head of origin of the
flexor carpi ulnaris m.
THE CUBITAL FOSSA is adepression that
lies infront of the elbow joint&triangular in
shape
Boundaries;
lat.;brachioradialis m.
med.;pronater teres m.
base;by imaginary line
drawbetween the two
epicondyles of the
humerus.
roof ;sin&fasciareinforced
by the bicipital
aponeurosis.
Content;from M.to L.
Median n.,bifurication of
brachial a.,tendon of
biceps.radial n.&its
branches.
Supratrochlear lymph node
Lies in the superficial fascia over the
upper part of the forearm above the
trochlea.
It receive afferant lymph vessel
from3rd ,4 ,5 th fingers,medial part
of the hand& medial side of forearm.
The efferant vesseles pass to the
axilla to enter the lateral axillary
nodes.
THE ELBOW
JOINT
Is a synovial joint of hinge
variety between the
trochlea&capitellum of
the humerus and the
trochlear notch of the
ulna &the head of radius.
N.supply;branches from
M.,U.,R.&Musculo.
MOVEMENTS;
FLEXIONbrachialis,biceps assisted
by
brachioradialis,pronater
teres&common flexor ms.
EXTENSION-triceps m.
STABILITY
THE ELBOW JOINT
1-The elbow is a very
stable hinge joint
because of the
wrench shape of the
trochlear notch of
the ulna which fits
around the pully
shape of the
trochlea of the
humerus.
2-close proximity of
brachialis&triceps
ms.
•
3-Lateral collateral
ligament.triangular in shape
attached by its apex to the
lat.epicondyle of the humerus
&by its base to the upper
margin of the annular lig.
4-Medial collateral ligament.is
also triangular in shape
consist of 3 strong bands.
1-ant.bandfrom med.epicondyle
to the medial margin of
coronid process.
2-post.band from med.epicondyle
to the medial side of
olecranon.
3-transvers band between ulnar
attachment of th etwo
preceding bands.
SUPERIOR RADIOULNAR JOINT
Synovial joint of pivot
variety between the
circumference of the
radial head&the
annular lig.and the
radial notch on the
ulna.the capsule
encloses thejoint
&is contineous with
that of elbow joint.
N.supply;branchesM.,U
.,R&Musculo.
MOVEMENTS;pronatio
n&supination of
forearm.
Lig.;the annular lig.is
attached to the
ant.&post.margin of the
radial notch of the ulna
and form a collar around
the radial head .it is
continuous above with
the capsule of the elbow
joint.
ARTERIAL ANASTOMOSIS AROUND
THE ELBOW JOINT
Recurrent branches in
some cases double
arise from
radial,ulnar&interos
seous arteries and
run upward both
ant.&post.to the
elbow joint to
anastomose with
descending articular
branches of the
profunda,ulnar
collateral&supratroc
hlear arteries.