The term "incisura ischiadica major" refers to a specific feature of the human pelvis. It is pronounced as "in-sih-soo-rah iss-kee-ah-dih-kuh may-jer" with IPA phonetic transcription [ɪnˈsɪsʊrə ɪskaɪˈdɪkə ˈmeɪdʒər]. The incisura ischiadica major is a notch located within the ischium bone, which is one of the three bones that make up the pelvis. This important anatomical feature serves as the attachment site for several muscles and ligaments that play crucial roles in supporting the lower body.
The term "incisura ischiadica major" refers to a specific anatomical structure found in the human body. It is also known as the greater sciatic notch, and its name derives from Latin, where "incisura" means "notch" and "ischiadica" refers to the ischium, which is the lower and posterior part of the hip bone.
The incisura ischiadica major is a deep concavity or notch located in the posterior aspect of the hip bone, just below the ilium. It forms the lower boundary of the greater sciatic foramen, which is a passageway that allows structures such as nerves and blood vessels to pass in and out of the pelvis.
This anatomical structure is particularly important due to its association with the sciatic nerve, which is the largest and longest nerve in the human body. The sciatic nerve originates in the lower spine and extends down the back of the thigh, eventually branching out to innervate various leg muscles and provide sensation to the lower limb.
The incisura ischiadica major serves as a crucial landmark for the identification and protection of the sciatic nerve during certain medical procedures, such as hip surgeries or injections into the buttock region. Knowledge of this anatomical structure is also significant for anatomists, medical professionals, and researchers studying the pelvic region and its associated structures.
Great sciatic notch, iliosciatic notch, a deep indentation on the posterior border of the innominate bone at the point of union of the ilium and ischium.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.