GENERAL INFORMATION
The deep muscles of the thigh, also known as the deep femoral muscles or adductor muscles, are located on the inner aspect of the thigh. These muscles play a crucial role in various movements, including adduction of the hip (bringing the leg toward the midline) and stabilising the hip joint.
ORIGIN
These muscles have their origins in different areas:
- Adductor longus: Pubic bone.
- Adductor brevis: Pubic bone.
- Adductor magnus: Pubic bone, ischium (part of the pelvis), and femur.
- Gracilis: Pubic bone.
INSERTION POINT
The deep muscles of the thigh have the following insertion points:
- Adductor longus: Middle third of the linea aspera (ridge on the posterior aspect of the femur).
- Adductor brevis: Pectineal line (line on the superior aspect of the pubic bone).
- Adductor magnus: Linea aspera, adductor tubercle (prominence on the posterior aspect of the femur), and the medial supracondylar line (ridge on the distal end of the femur).
- Gracilis: Medial surface of the tibia, just below the tibial tuberosity.
MAJOR ARTERIES
The major arteries supplying the deep muscles of the thigh include:
- Deep femoral artery (profunda femoris artery)
- Obturator artery
NEURAL INNERVATION
The deep muscles of the thigh are innervated by the obturator nerve and the sciatic nerve branches, specifically the tibial nerve. These nerves provide motor innervation to the deep muscles, allowing them to contract and produce movement.
TRIGGER POINT
Trigger points in the deep muscles of the thigh are less common compared to other muscle groups, but they can develop due to overuse or muscle imbalances.
CONCENTRIC FUNCTION
The concentric function of the deep muscles of the thigh involves the shortening or contraction of the muscles. This function is primarily responsible for adduction of the hip, bringing the leg toward the midline.
ECCENTRIC FUNCTION
The eccentric function of the deep muscles of the thigh refers to the controlled lengthening of the muscles while resisting an external force. It is involved in movements such as decelerating the leg during adduction.
ISOMETRIC FUNCTION
The isometric function of the deep muscles of the thigh involves contracting the muscles without any change in length. Isometric contractions of these muscles occur during activities that require stability and maintaining the position of the hip joint.
RELATED MUSCLE SCIENTIFIC NAMES
- Adductor longus muscle (Musculus adductor longus): This muscle originates from the pubic bone and inserts onto the middle third of the linea aspera of the femur. It is primarily involved in hip adduction.
- Adductor brevis muscle (Musculus adductor brevis): Originating from the pubic bone, this muscle inserts onto the pectineal line of the femur. It assists in hip adduction and flexion.
- Adductor magnus muscle (Musculus adductor magnus): This large muscle originates from the pubic bone, ischium, and femur. It inserts onto the linea aspera, adductor tubercle, and medial supracondylar line of the femur. It plays a significant role in hip adduction, extension, and medial rotation.
- Gracilis muscle (Musculus gracilis): Originating from the pubic bone, it inserts onto the medial surface of the tibia just below the tibial tuberosity. This muscle assists in hip adduction and knee flexion.
ANTAGONIST
The antagonist muscle group to the deep muscles of the thigh is the gluteus medius and minimus muscles, which are responsible for abducting the hip (moving the leg away from the midline).
COMMON INJURIES
- Groin strain: Overstretching or tearing of these muscles due to sudden movements or excessive physical activity.
- Adductor tendinitis: Inflammation of the tendons of the deep muscles of the thigh, often caused by repetitive stress or overuse.
- Muscle imbalances: Leading to pelvic misalignment or dysfunction.
EXERCISES
- Adductor squeezes: Squeezing a soft ball or pillow between the thighs while seated or lying down to strengthen the deep muscles of the thigh.
- Cable hip adductions: A cable machine is used to perform hip adduction exercises, targeting the deep muscles of the thigh.
- Lunges with adduction: Performing lunges with an adduction component, crossing the leg in front of the body during the lunge.
STRETCHES
- Butterfly stretch: Sit with the soles of your feet touching and gently press the knees downward to stretch the deep muscles of the thigh.
- Seated straddle stretch: Sitting with legs extended wide apart and reaching forward to stretch the inner thigh muscles.
- Adductor stretch: Standing with legs wide apart and leaning to one side, feeling a stretch along the inner thigh.
