Transcript Medial Side Of The Thigh

MEDIAL SIDE OF THE
THIGH
1.
2.
3.
Ilioinguinal nerve (L1).
Cutaneous branch of obturator nerve (L2,3,4).
Posterior branch of medial cutaneous nerve of
the thigh (L2,3)

1.
2.
3.

There are 3 adductor muscles arranged from
anterior to posterior:
Adductor longus.
Adductor brevis.
Adductor magnus.
More superficial to the 3 adductors there is a
gracilis muscle.
origin
Insertion
N.S.
actions
Add.
longus
Front of body of Linea aspra
pubis below
pubic tubercle
Anterior
branch of
obturator
nerve
Adduction.
Flexion.
Lat.rotation.
Add.
brevis
Body of pubis + Lower part of line
inf. Pubic ramus between lesser
trochanter and L.
aspra + L.aspra
Anterior
branch of
obturator
Adduction
Flexion
Lat. rotation
Add
magnus
Pubic part
(conjoint ramus)
Ischial part
(ischial
tuberosity
Pubic part (gluteal
tuberosity, L.aspra,
med.Supracondylr
ridge)
Ischial part(add.
tubercle of femur)
Pubic part
(post. Branch
of obturator).
Ischial part
(sciatic n.)
Pub.part;
addction,
flexion, lat,
rotation)
Ischial part;
extension of
hip)
gracilis
Conjoint ram.
tibia
Ant. B.otur.
Add. Thigh
Flex knee
Origin:
 It is a branch of the lumbar plexus.
 It arises from the ventral divisions of the
ventral rami of L2,3,4.
A- Origin
Course& relations:
 It reaches the thigh by passing through the
obturator canal.
 Immediately it divides into anterior and
posterior branches. The anterior branch
descends infront of the adductor brevis and
infront of adductor longus and pectineus.
 The posterior branch passes through the
obturator externus and then behind
adductor brevis and infront of adductor
magnus.
Anterior division
femoral artery
Pectineus
Anterior division
Adductor longus (cut)
Adductor brevis
Gracilis
Adductor longus (cut)
Anterior branch:

It gives the following branches:
1.
Articular branch to the hip.
2.
Muscular branch to adductor brevis.
3.
Muscular branch to adductor longus.
4.
Muscular branch to gracilis.
5.
Cutaneous branch which supplies the skin
on the middle 1/3 of the medial side of the
thigh.
Posterior division
Posterior branch:

It gives the following branches:
1.
Muscular branch to obturator externus.
2.
Muscular branch to pubic part of adductor
magnus.
3.
Genicular branch.
N.B. Obturator nerve carries vasoconstrictor
fibers from the lumbar part of sympathetic
trunk to the obturator artery and its
branches.




An occasional branch of the lumbar plexus.
Only found in 12% of subjects.
It descends close to medial side of psoas major
muscle behind inguinal ligament.
It gives branches to pectineus and hip joint.
A- Origin

It leads to marked weakness of adduction of
thigh however slight degree of adduction can
be done by pectineus.
Origin:
 It is a branch of anterior
division of the internal iliac
artery.
Course & relations:
 It enters the thigh by
passing through obturator
canal and immediately
divides into anterior and
posterior branches.
 The two branches diverge
and runs on the outer
aspect of obturator
membrane along the
margin of obturator
foramen and under cover
of obturator externus.
Distribution:
The two branches anastomose
together to form an arterial
circle.
It gives the following
branches:
1.
Muscular branches to:
Obturator externus, adductors,
pectineus and gracilis.
2.
Acetabular branch, to the
hip joint.
3.
Anastomotic twigs to the
medial circumflex femoral
and inferior gluteal artery.