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The ischial tuberosity (or tuberosity of the ischium, tuber ischiadicum), also known colloquially as the sit bones or sitz bones, [1] or as a pair the sitting bones, [2] is a large posterior bony protuberance on the superior ramus of the ischium. It marks the lateral boundary of the pelvic outlet.
It arises by tendinous fibers from the inner and forepart of the ischial tuberosity and, running medially, is inserted into the central tendinous point of the perineum (perineal body), joining in this situation with the muscle of the opposite side, with the external anal sphincter muscle behind, and with the bulbospongiosus muscle in front.
ischial tuberosity [11] pes anserinus: inferior gluteal artery, perforating arteries: sciatic nerve [11] (tibial, L5, S1, S2) flexes knee, extends hip, medially rotates leg at knee [11] quadriceps femoris: 2 1 semimembranosus: Lower limb, Thigh, Posterior compartment/hamstring ischial tuberosity [11] medial surface of tibia [11] profunda ...
Ischial tuberosity: Insertion: Medial condyle of tibia: Artery: Profunda femoris and gluteal arteries: Nerve: Tibial part of sciatic nerve (L5, S1 and S2) Actions: Extension of hip and flexion of knee: Antagonist: Quadriceps muscle and tensor fasciae latae: Identifiers; Latin: musculus semimembranosus: TA98: A04.7.02.036: TA2: 2642: FMA: 22438 ...
The Thinker by Auguste Rodin. Sitting is a basic action and resting position in which the body weight is supported primarily by the bony ischial tuberosities with the buttocks in contact with the ground or a horizontal surface such as a chair seat, instead of by the lower limbs as in standing, squatting or kneeling.
The adductor magnus is a large triangular muscle, situated on the medial side of the thigh.. It consists of two parts. The portion which arises from the ischiopubic ramus (a small part of the inferior ramus of the pubis, and the inferior ramus of the ischium) is called the pubofemoral portion, adductor portion, or adductor minimus, and the portion arising from the tuberosity of the ischium is ...
The ischium is the strongest of the three regions that form the hip bone. It is divisible into three portions: the body, the superior ramus, and the inferior ramus. The body forms approximately one-third of the acetabulum. The ischium forms a large swelling, the tuberosity of the ischium, also referred
A line drawn across the surface connecting the ischial tuberosities divides the space into two triangles: The anterior urogenital triangle contains the penis and scrotum (males) or vulva (females) The posterior anal triangle contains the anus; The formal anatomical boundaries of the perineum may be said to be: [6]