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Medial Compartment of the thigh
Medial Compartment of the thigh
17
Anatomy
Graduate
07/13/2011

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Term

Medial Compartment of the Thigh

The medial compartment is separated from the anterior compartment by an inward extension of the fascia lata, the _____.

Definition

Medial Compartment of the Thigh

The medial compartment is separated from the anterior compartment by an inward extension of the fascia lata, the medial intermuscular septum.

Term
Genitofemoral n.
Definition
  •  L1-2; cutaneous to area just inferior to middle part of inguinal ligament
Term
Lateral femoral cutaneous n.
Definition
  • from posterior divisions of L2-3; enters thigh deep to inguinal ligament near ASIS; cutaneous to lateral thigh
Term
Ilioinguinal and iliohypogastric nerves
Definition
  •  branches of L1, cutaneous to suprapubic and inguinal regions
Term
Lumbosacral trunk
Definition
  • participates in the sacral plexus with ventral rami of S1-S4
Term
Femoral n.
Definition
  • from posterior divisions of L2-L4; enters thigh deep to the inguinal ligament and lateral to the femoral sheath and divides into several branches; innervates muscles of anterior compartment of thigh (except tensor fascia lata); supplies cutaneous branches to anterior thigh; via saphenous nerve, supplies skin on anteromedial knee, leg and foot.
Term
Obturator n.
Definition

from anterior divisions of L2-4; enters thigh through a gap in the obturator foramen (the obturator canal).  It divides into an anterior and posterior divisions which pass on respective sides of adductor brevis.  It innervates muscles of medial compartment of thigh (except hamstring part of adductor magnus) and provides a cutaneous branch to medial thigh

Term
Branches of the lumbar plexus (7)
Definition
  • obturator n.
  • femoral n. 
  • lumbosacral trunk
  • ilioinguinal and iliohypogastric nerves
  • lateral femoral cutaneous n.
  • genitofemoral n.
Term
Blood supply to the Medial Compartment
Definition

Blood supply is from the femoral artery, perforating branches of the deep femoral artery and from the obturator artery (branch of internal iliac artery)

Term
Boundaries and Contents of the Adductor Canal
Definition
    1. Boundaries
      1. Posterior: adductor longus and magnus
      2. Medial (“roof”): sartorius
      3. Anterolateral: vastus medialis
    2. Contents: femoral vessels, branch of femoral nerve to vastus medialis and saphenous nerve
Term

The Adductor Canal- a fascial tunnel running from the apex of the femoral triangle to the _____ (in the tendon of adductor magnus).

Definition

The Adductor Canal- a fascial tunnel running from the apex of the femoral triangle to the adductor hiatus (in the tendon of adductor magnus).

Term
Obturator Externus - deep to pectineus
Definition
    1. Origin- external surface of obturator foramen and membrane
    2. Insertion- passes posterior to the neck of the femur and attaches to the trochanteric fossa
    3. Innervation- obturator nerve; L3, L4
    4. Function- externally rotates thigh, steadies head of femur in acetabulum
Term
  1. Gracilis
Definition
  1. Origin- body and inferior ramus of pubis
  2. Insertion- medial surface of proximal tibia between insertions of sartorius and semitendinous; contributes to pes anserinus tendon 
  3. Innervation- obturator nerve; L2, L3
  4. Function- adducts thigh, flexes and weakly internally rotates leg at knee
Term
Adductor Magnus

Definition
  • Origin-Adductor Part- inferior ramus of pubis, ramus of ischium. Hamstring part- ischial tuberosity
  • Insertion-
    Adductor Part- gluteal tuberosity, linea aspera, medial supracondylar line
    Hamstring Part- adductor tubercle
  • Innervation
    Adductor Part- obturator nerve; L2, L3, L4
    Hamstring Part- tibial part of sciatic nerve; L4
  • Function-
    Adductor Part- adducts thigh, weakly flexes thigh
    Hamstring Part- weakly extends thigh
Term
Adductor Brevis- deep to adductor longus and pectineus
Definition

Origin- body and inferior ramus of pubis
Insertion- pectineal line (of femur) and proximal part of linea apera
Innervation-  obturator nerve; L2, L3, L4
Function- adducts thigh

Term
Adductor Longus - most anterior/superficial of the adductor group
Definition
  • Origin- body of pubis
  • Insertion- middle 1/3 of linea aspera
  • Innervation- obturator nerve; L2, L3, L4
  • Function- adducts thigh
Term
Muscles of the Medial compartment of the thigh (5)
Definition
  • adductor longus
  • adductor brevis
  • adductor magnus
  • gracilis
  • obturator externus
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