Adductor Longus

Original Editor - Leana Louw

Top Contributors - Leana Louw and Kim Jackson

Description

Adductor longus is one of the adductor muscles of the medial thigh.[1] Together with adductor brevis, adductor magnus, gracilis and obturator externus, it makes up the adductor compartement.[1] This large fan-shaped muscle is situated most anteriorly of this group and covers the middle part of adductor magnus and the anterior part of adductor brevis.[1]

Adductor longus.gif

Origin

Strong tendon from anterior aspect of pubic body inferior to pubic crest.[1]

Insertion

Linea aspera on middle third of femur.[1]

Nerve

Anterior devision of obturator nerve (L2, L3, L4).[1]

Artery

  • Obturator artery[2]
  • Medial circumflex femoral artery[2]

Function

Adduction of femur.[1]

Clinical relevance

Assessment

  • Manual muscle testing:[3]
    • Patient positioned in side-lying with side being tested resting at the bottom on the bed. The top leg is supported by the examiner in 25 degrees of abduction. The examiner applies manual resistance to the distal femur proximal to the knee joint in the direction of the bed while the patient actively adducts against the examiner's hand.
    • Determine strength by using Oxford grades 0-5.
  • Adductor squeeze test
  • Hip adductor length test:[4]
    • Patient is positioned in crook-lying with a posterior pelvic tilt. The patient abducts the hips by moving the knees outwards towards the sides of the bed.
      • Adductor stiffness: Patient not able to maintain position, (+) anterior pelvic tilt
      • Inhibition of gluteus medius and external rotators of hip can be noted,, causing muscle imbalances and compensatory movement patterns.
    • Tests for abdominal weakness as well.

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Moore KL, Dalley AF, Agur AMR. Clinial oriented anatomy. Philadelphia: Wolters Kluwer, 2010.
  2. 2.0 2.1 University of Washington. Department of Radiology. Adductor Longus. Available from: https://rad.washington.edu/muscle-atlas/adductor-longus/ (accessed 11/07/2020).
  3. Hislop H, Avers D, Brown M. Daniels and Worthingham's Muscle Testing: Techniques of manual examination. Elsevier Health Sciences; 2013.
  4. Norris CM. Spinal stabilisation: 4. Muscle imbalance and the low back. Physiotherapy 1995;81(3):127-38.