GENERAL INFORMATION
The iliac region is located in the lower part of the abdomen, specifically overlying the iliac bones. It contains various structures, including muscles, nerves, blood vessels, and organs. This region plays a crucial role in supporting and stabilising the pelvis and lower back.
ILIACUS
The iliacus is a muscle located in the iliac region. It is part of the iliopsoas muscle group and is significant for hip flexion and stabilising the pelvis.
ORIGIN
The iliacus muscle originates from the iliac fossa, which is a concave surface on the inside of the iliac bone.
INSERTION POINT
The iliac region inserts onto the lesser trochanter of the femur, a bony prominence located on the inner aspect of the thigh bone.
MAJOR ARTERIES
The iliacus muscle receives its blood supply from branches of the iliac arteries, including the iliolumbar artery and the obturator artery.
NEURAL INNERVATION
The iliacus muscle is innervated by the femoral nerve (L2-L4), providing sensory and motor innervation to the lower limb.
TRIGGER POINT
Trigger points in the iliacus muscle can cause pain and discomfort in the hip and lower back region. These trigger points can be activated by muscle overuse, poor posture, or muscle imbalances.
CONCENTRIC FUNCTION
During contraction, the iliacus muscle flexes the hip joint, bringing the thigh bone closer to the torso. This action is essential for activities such as walking, running, and climbing stairs.
ECCENTRIC FUNCTION
The eccentric function of the iliac region muscle occurs during controlled lengthening, such as in the lowering phase of a squat or lunge. This function helps decelerate the leg and maintain balance.
ISOMETRIC FUNCTION
The iliac region muscle can contract isometrically to stabilise the pelvis and maintain hip joint stability. This is important for maintaining posture and balance during static positions and weight-bearing activities.
RELATED MUSCLE-SCIENTIFIC NAMES
- Iliopsoas (combination of iliacus and psoas major): Important for hip flexion and trunk stability.
ANTAGONIST MUSCLES
- Gluteus maximus: Extends the hip.
- Hamstrings (e.g., biceps femoris, semitendinosus, semimembranosus): Flex the knee and extend the hip.
COMMON INJURIES
- Strains or tears of the iliacus muscle: Caused by overstretching or overuse, leading to pain and weakness in the hip region.
- Hip flexor tendinitis: Inflammation due to repetitive stress, resulting in pain and stiffness in the hip area.
- Muscle imbalances Can lead to pelvic instability and related issues, affecting overall lower limb function.
EXERCISES
Exercises that target the iliac region muscle include:
- Hip flexion exercises (e.g., leg raises, knee raises): Strengthen the iliacus and hip flexors.
- Squats and lunges: Engage the iliacus along with other hip and leg muscles for overall strength.
- Pilates exercises: Target the hip flexors and core muscles for improved stability.
STRETCHES
Stretches for the iliac region muscle include:
- Kneeling hip flexor stretch: Lengthens the iliacus and hip flexors.
- Supine figure-four stretch: Targets the hip and lower back muscles.
- Seated butterfly stretch: Opens up the hips and stretches the inner thighs.
- Pigeon pose (variation): Deep stretch for the hip flexors and glutes.
