Major Muscles of the Anterior Thigh and Their Nerve Supply
Pectineus Muscle: Structure, Function, and Dual Nerve Supply
The pectineus muscle in the anterior thigh is responsible for hip flexion and adduction and is unique for its dual nerve supply from the femoral and obturator nerves.
Major Muscles of the Anterior Thigh and Their Nerve Supply
Pectineus Muscle: Structure, Function, and Dual Nerve Supply
The anterior thigh contains several major muscles responsible for movement and stability. Among them, the pectineus muscle plays a crucial role in hip flexion and adduction.
Structure and Location
The pectineus muscle is a flat, quadrangular muscle located in the upper anterior part of the thigh. It originates from the pectineal line of the pubis and inserts into the femur.
Function
- Hip Flexion: Helps in raising the thigh towards the torso.
- Hip Adduction: Assists in bringing the thigh inward.
- Postural Support: Stabilizes the pelvis during movements.
Dual Nerve Supply
Unlike most muscles, the pectineus has a dual nerve supply:
- Femoral Nerve (L2-L4): Provides motor innervation for hip flexion.
- Obturator Nerve (L2-L4): Assists in hip adduction.
Clinical Significance
Due to its dual innervation, injury to either nerve can lead to partial dysfunction rather than complete paralysis. Understanding its anatomy is crucial in orthopedic and neurological assessments.
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