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1. Ilioinguinal nerve (L1).2. Cutaneous branch of obturator nerve
(L2,3,4).3. Posterior branch of medial cutaneous
nerve of the thigh (L2,3)
There are 3 adductor muscles arranged from anterior to posterior:
1. Adductor longus.2. Adductor brevis.3. Adductor magnus. More superficial to the 3 adductors there
is a gracilis muscle.
origin Insertion N.S. actionsAdd. longus
Front of body of pubis below pubic tubercle
Linea aspra Anterior branch of obturator nerve
Adduction.
Flexion.
Lat.rotation.
Add. brevis
Body of pubis + inf. Pubic ramus
Lower part of line 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
Adductor longus (cut)
Adductor longus (cut)
Gracilis
Adductor brevis
Pectineus
Anterior division
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.