The correct spelling of the muscle located on the anterior aspect of the thigh called "musculus vastus intermedius" is /ˈmʌskjʊləs ˈvæstəs ɪntərˈmiːdiəs/. The IPA phonetic transcription represents the sounds of each letter and syllable, making it easier to understand the pronunciation. The "s" in "musculus" and "vastus" are pronounced like a "z," while the "c" in "musculus" sounds like a "k." The "i" in "intermedius" is pronounced like "ee," and the stress is on the second syllable.
Musculus vastus intermedius, commonly known as the vastus intermedius muscle, is a muscle located in the anterior (front) compartment of the thigh. It is one of the four muscles that make up the quadriceps femoris group, along with the vastus lateralis, vastus medialis, and rectus femoris muscles.
The musculus vastus intermedius arises from the anterior and lateral surface of the femur (thigh bone) and extends downward towards the patella (kneecap). It lies deep to the rectus femoris muscle and is separated from it by a layer of connective tissue called the vastus intermedius tendon. The muscle becomes narrower as it approaches the patella and finally blends with the quadriceps tendon, which attaches to the patella.
The main function of the musculus vastus intermedius is to extend the leg at the knee joint. It plays a crucial role in activities such as running, walking, jumping, and squatting. Along with the other quadriceps muscles, the vastus intermedius also helps in stabilizing the knee during movements and provides support to the patella.
Injuries or conditions affecting the vastus intermedius can result in pain, weakness, or limited mobility in the knee. Understanding the anatomy and function of this muscle is essential for medical professionals in diagnosing and treating such issues.
M. crureus; origin, upper three-fourths of anterior surface of shaft of femur; insertion, common tendon of quadriceps femoris.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.