Nerves
Brachial PlexusRoots
C5
C6
C7
C8
T1
Brachial PlexusTrunks
UpperTrunk
MiddleTrunk
LowerTrunk
C5
C6
C7
C8
T1
Brachial PlexusDivisions
Eash trunk gives anterior and
posterior divisions(behind middle ⅓ of the clavicle )
C5
C6
C7
C8
T1
Brachial PlexusCords
C5
C6
C7
C8
T1
PosteriorCord
Brachial PlexusCords
C5
C6
C7
C8
T1
PosteriorCord
MedialCord
Brachial PlexusCords
C5
C6
C7
C8
T1
PosteriorCord
MedialCord
LateralCord
Brachial PlexusLateral Cord Branches
Lateralpectoral
Musculocutaneous
Lateral rootof Median n.
Brachial PlexusMedial Cord Branches
Medial Rootof Median
Medial Pectoral
Medial Cutaneousn. of Forearm
Ulnar
Brachial PlexusPosterior Cord Branches
UpperSubscapular
LowerSubscapular
Axillary
N. To LatissimusDorsi
Radial
Brachial PlexusUpper Trunk Branches
Suprascapular
Nerve to Subclavius
Brachial PlexusRoots Branches C5
C6
C7
C8
T1
N. toSerratusAnterior
Root ofPhrenic
N. ToRhomboids
Brachial PlexusInjuries1.Complete Injury
Brachial PlexusInjuries2.Erb’s Injury
Brachial PlexusInjuries3.Klumpke’s Injury
MusculocutaneousNerve
Mixed nerve from the lateral cord
Course:Lareral: the 3rd part of Axillary artery
Leaves the axilla by piercing the coracobrachialis m.
Then descends downwards between biceps and brachialis.
Finally continues as lateral cutaneous nerve of the forearm
Branches:Coracobrachialis, Biceps & Brachialis
Radial NerveC5,6,7,8,T1
Course & Relations:
Arm
Lies behind the upper part of the brachial artery between it & the 2 heads of triceps
long headof Triceps
Brachial artery
Radial NerveC5,6,7,8,T1
Course & Relations:
ArmAfter leaving the spiral
groove:The nerve pierces the lateral intermuscular septum to enter the
anterior compartment on the lateral side of the
arm
Radial NerveC5,6,7,8,T1
Course & Relations:
ForearmIn front of the lateral
epicondyleit gives the
posterior interosseous
& continues downwards as the superficial radial
nerve.
Supinator
Radial NerveC5,6,7,8,T1
Course & Relations:
ForearmNerve winds around the lateral side of the radius to reach the
back of the hand cross over the anatomical snuff box
Median NerveFormed by:
branches from medial & lateral cords(C6, 7, 8 & T1)
Crosses the brachial artery
Brachialartery
Median Nerve
Lies medial to biceps,
Course
Biceps
Mediannerve
Ulnarnerve
Median Nerve
Lies medial to biceps,
anterior to brachialis & triceps
Course
Brachialis
Mediannerve
Ulnarnerve
Triceps
Triceps
In the arm: gives no branches
Median NerveCourse
Passes bet 2 heads of pronator teres
deep to flexor digitorum superficialis
deep to flexor retinaculum
BetweenFlexor Pollicis Longus &
Flexor Digitorum Superficialis
Lies onFlexor Digitorum Profundu
Median NerveBranches
Supplies flexors of the forearm
Except
FlexorCarpi-Ulnaris
Medial ½Flexor Digitorum
Profundus
FlexorPollicisBrevis
AbductorPollicisBrevisMedian Nerve
Branches
OpponensPollicis
All Thenar Ms.Except
Adductor Pollicis
1st & 2nd
Lumbricals
Median NerveBranches
PalmarCutaneous
Nerve of Palm
Median NerveBranches
Palmar surface of lateral 3 ½ digits
Median NerveInjury
ApeHand
Deformity
Ulnar NerveTerminal branch of
the medial cord of the brachial plexus
Ulnar NervePasses through
posterior compartment of the arm
(behind the medial epicondyle )
UlnarnerveMedian
nerve
NOBRANCHES IN
ARM
Ulnar NerveEnters between
the heads of flexor carpi ulnaris
FlexorDigitorumProfundus
FlexorCarpi ulnaris
Ulnar NerveIn the Forearm
Supplies:
Medial ½Flexor
DigitorumProfundus
FlexorCarpi ulnaris
Ulnar NerveEnds by dividing into:
1. Superficial Branch
Superficial Branchabove Retinaculum
1 ½ fingers
Ulnar NerveEnds by dividing into:
1.Superficial Branch2.Deep Branch
AllHypothenar
muscles
AllInterossei
AdductorPollicis
3rd & 4th
Lumbricals
Sciatic NerveRoots
L4
L5
S1
S2
S3
It arises from:
L4 – S3
Sciaticnerve
Sciatic NerveExtent
Sciaticnerve
Piriformsmuscle
Inferior border of Piriformsto
Lower 1/3 of the thigh
Sciatic NerveCourse & Branches
Leaves pelvisthrough
Greater Sciatic foramenSciaticnerve
Sciatic Nerve
Biceps femoris
Semitendinosis
Adductor Magnus
Semimembranosus
Sciatic Nerve
Sciaticnerve
Tibialnerve
CommonPeroneal
nerve
Divides into:•Tibial nerve•Common Peroneal nerve
Sciatic Nerve
Tibial
SuppliesMuscles of the foot
Tibial
Supplies SuperficialPosterior Compartment of leg
Sciatic NerveCommon Peroneal
Supplies AnteriorCompartment of leg
LateralSuralnerve
Common Peroneal