Deltoidilihasse

Deltoidilihasse is a term that appears to be a misspelling or a portmanteau of anatomical terms. The most likely intended meaning relates to the deltoid muscle and the iliacus muscle, or potentially the iliotibial band.

The deltoid muscle is the large, triangular muscle that covers the shoulder joint. It is responsible for the abduction (lifting away from the body), flexion (lifting forward), and extension (lifting backward) of the arm. It is composed of three parts: anterior (front), lateral (middle), and posterior (rear) fibers, each contributing to different movements.

The iliacus muscle is a large, flat muscle located in the iliac fossa of the pelvis. It works in conjunction with the psoas major muscle to form the iliopsoas, which is the primary flexor of the hip joint. This action allows for the lifting of the thigh towards the torso.

If the term refers to the iliotibial (IT) band, it is a thick band of fibrous tissue that runs along the outside of the thigh, from the hip to just below the knee. It plays a role in stabilizing the knee and hip joints.

Without further context, it is difficult to definitively define "deltoidilihasse." However, based on anatomical knowledge, it most likely refers to a combination of shoulder and hip musculature or related structures, or it is an error in transcription.