GENERAL INFORMATION
The adductor muscles of the hip are a group of muscles located on the inner side of the thigh. They play a crucial role in hip adduction, which is the movement of bringing the leg toward the midline of the body. These muscles are involved in various activities, such as walking, running, and maintaining stability during weight-bearing movements.
ORIGIN
These muscles originate from the pelvis, specifically from the pubic bone and the ischium.
INSERTION POINT
The adductor muscles of the hip have different insertion points on the femur (thigh bone). These insertion points also include the linea aspera, the medial epicondyle, and the adductor tubercle.
MAJOR ARTERIES
The adductor muscles of the hip receive blood supply from the branches of the deep femoral artery, which also includes the medial circumflex femoral artery and the obturator artery.
NEURAL INNERVATION
They are primarily innervated by the obturator nerve, which arises from the lumbar plexus. The obturator nerve provides motor innervation for these muscles, controlling their contraction, and also carries sensory information from the region.
TRIGGER POINT
Trigger points can develop in the adductor muscles of the hip, causing localised pain and discomfort. They are often associated with muscle overuse, postural imbalances, or repetitive strain.
CONCENTRIC FUNCTION
The adductor muscles of the hip function concentrically to produce hip adduction. This means they contract and shorten during movements, such as bringing the leg inward toward the midline of the body.
ECCENTRIC FUNCTION
The adductor muscles of the hip also function eccentrically to control movements such as hip abduction, where the leg moves away from the midline. Eccentric contraction allows for controlled deceleration and stabilisation during these movements.
ISOMETRIC FUNCTION
The adductor muscles of the hip can contract isometrically to provide stability and support during static positions or when the hips need to resist forces that try to pull the legs apart.
RELATED MUSCLE-SCIENTIFIC NAMES
The adductor muscles of the hip include:
- Adductor longus (Musculus adductor longus): Located in the middle of the thigh, responsible for adducting the hip.
- Adductor brevis (Musculus adductor brevis): Positioned beneath the adductor longus, aids in hip adduction.
- Adductor magnus (Musculus adductor magnus): The largest adductor muscle, it assists in hip adduction, extension, and medial rotation.
- Gracilis (Musculus gracilis): A long, thin muscle that assists in hip adduction and knee flexion.
- Obturator externus (Musculus obturator externus): Aids in lateral rotation and adduction of the hip.
ANTAGONIST
The primary antagonist to the adductor muscles of the hip is the gluteus medius muscle. The coordinated action of the adductor muscles and the gluteus medius allows for balanced and controlled movements of the hip joint.
COMMON INJURIES
Common injuries to the adductor muscles of the hip may include strains, tears, or tendinitis. These injuries can occur due to sudden movements, overstretching, or repetitive stress. Commonly affected individuals include athletes involved in sports that require quick changes in direction or kicking motions.
EXERCISES
Exercises that target them include:
- Side-lying leg lifts: Lie on your side and lift the top leg upward while keeping it straight. This exercise targets the adductor muscles.
- Standing cable hip adduction: Attach a cable machine to your ankle and pull your leg inward against resistance. This movement strengthens the adductors.
- Ball squeeze: Place a small ball or pillow between your knees and squeeze it with both legs while standing or lying down. This exercise activates the adductors.
STRETCHES
Stretches for these muscles include:
- Butterfly stretch: Sit on the floor with the soles of your feet together and gently press your knees downward to stretch the inner thighs.
- Seated adductor stretch: Sit on the floor with your legs wide apart and lean forward to reach toward your feet, stretching the inner thigh muscles.