rffifr; O a These muscles arise from pubic_bone. All are supplied by obturator nerve except pectineus (by obturator nelve and femoral nerve). Action: adduction of the hip joint. f,dduffirb+ElrE Adil.rnrFrg.s Frpftratrgartrl* Addrtorregnw Gnlcn-rs wlvEgggtT Obturator nerve. f!I)trcrrConjoint ramus (inferior pubic ramus & ischial ramus). Upper part of the medial surface of the tibia (behind sartorius).

 

o Leaves the pelvis through greater sciatic foramen below the piriformis &

descends in the gluteal region.

o It extends from the inferior border of the piriformis muscle to the lower Ts ol

the thigh.

o lt is crossed obliquely by the long head of biceps femoris muscle.

o lt ends by dividing into common peroneal (lateral politeal) & tibial (medial

popliteal) nerves.

N.B. Sometimes the nerue divides in the pelvis & tibial nerve takes the

same course of the sciatic nerue.

BnnrucHES:

a. Biceps femoris

b. Semitendinosus

c. Semimembranosus

d. lschial part of adductor magnus

N.B.

- The nerve is likely to be injured in posterior hip dislocation.

- lnjury of the nerve below mid-thigh ) intact hamstring muscles.

- it has bload supply from gluteal A.

I LowE LIMB

hfador

ghrlslartarl

lnlrrsl

lgrHd firry

Ers$hsfift

0LllfilrB rflfldmffi

Hlondlng artrylre

{th

IlBif,inBfim Eomrnon

ffibuhrnerw

LOWE LrMB I

It is purely sensory.

onlcttt: from sacrat ptexus (s2, s3 & s4).

CoURSE:

E tt OS : !n the pudendal canal by dividing into perineal nerve & the dorsal nerve

of the penis (or the clitoris).

OnlCltt: One of the 2 terminal divisions of the sciatic nerve at the middle of

the back of the thigh.

Enos: By dividing into:

1. Anterior Tibial nerve (deep peroneal): supplies anterior compartment of leg.

2. Musculo-cutaneous nerve (superficial peroneal): supplies lateral

compartment of leg & sensations over the front of lower part of leg.

1. Lateral cutaneous nerve of the calf.

2, Articular branches to knee joint,,

3. Terminal branches.

I-tOwElrMB

I'udF

etltrhrr

fmmotmrr

l@..U

lffirhr

6nmftnLhroo!!0tf,r

,,*"M*hwdt;ad

hrhrrg

urEnrr

f{drabpenat

BftffiilrhhIIIE.d

ORtGtN: The targer of the , ,"rr,n the sciatic nerve.

5H:i'l,,borderofpopliteuswhereitcontinuesasposteriortibialnerVe. BneucHEs:

1. Sural nerve,

2' Muscurar branches to; gastrocnemius, soreus, ptantaris and popriteus. 3. Articular branches to knee joint.

It formed bv :

o The nerves unite in front of coccygeus muscle to form the coccygeal plexus.

o The plexus gives origin to ano-coccygeal nerve; this nerve pierces the

sacro-tuberous Iigament to supply skin overlying the coccyx.

Dermatomes of the lower limb

I LOWE LrMB

o All are extensors of knee & supplied by femoral nerve.

o The ilio-psoas flex the hip.

SanroRrus

Femoral nerve.

Anterior superior iliac

spine (A.S.l.S.).

Upper part of

the medial

surface of the

tibia (S.G.S.T.).

Tailor's position

(cross leg position):

flexion of both hip &

knee joints.

Abduction & lateral

rotation of thigh &

medial rotation of

towF I rM* I

{r

ReCrus FEMoRIS

VnSruS MEDIALIS

Vasrus rnreRueorus

Upper Vs of the I See Q. femoris. I Femoral nerve. I Extension of the

anterior&lateral I I lknee.

surface of the femur.

QUADRICEPS FEMORIS

(RECTUS FEMORIS & 3 VASTII

lnsertion: Patella (by common tendon which extends as patettar tigament),

Nerue supplv: Femoral nerve.

Action: the whole muscle is the main extensor of the knee.

The rectus femorisis a/so flexor of hip joint.

Straioht head: anterior

inferior iliac spine.

Reflected head:

groove above

acetabulum.

See Before See Before Flexion of the hip

& extension of

the knee.

Medial lip of the linea Extension of the

knee.

Vlsrus Llrrnalrs

Lateral lip of the Iinea Extension of the

knee.

flowe t-ltr/s

Xffirh

nffiffirlf

tffiLltndft

ffiilfrr.r

lil+

fdlt5rtr$r

F*

*nffirtul

Nrfin*ffi

ffiEbrhlll:

Hf

Iftftntm

ilHr*xilE

ilifilrirffiEr

firffi

ffi

rffifr;

O

a

These muscles arise from pubic_bone.

All are supplied by obturator nerve except pectineus (by obturator nelve

and femoral nerve).

Action: adduction of the hip joint.

f,dduffirb+ElrE

Adil.rnrFrg.s Frpftratrgartrl*

Addrtorregnw

Gnlcn-rs

wlvEgggtT

Obturator nerve.

f!I)trcrrConjoint ramus

(inferior pubic ramus

& ischial ramus).

Upper part of the

medial surface of

the tibia (behind

sartorius).

-Adduction &

flexion of the

thigh.

Flexes & rotate

the leo mediallv

ECTINEUS

Obturator nerve &

femoral nerve.

Pectineal surface of

pubis.

Adduction of the

hip joint & flexion

I LowE LIMB

AooucroR Bnev6

Body & inferior ramus

of the pubis below

adductor lonqus.

AODUcToR LoNGUS

obturator nerve. Adduction of the

hip joint.

Front of the body of

the pubis just below

pubic tubercle