KP221 Lecture Notes - Lecture 32: Gluteus Medius Muscle, Gluteus Minimus Muscle, Tuberosity Of The Tibia

• School: WLU
• Department: Kinesiology & Physical Education
• Course: KP221
• Professor: Michael Cinelli

Document Summary

2 semis = medial (smaller, work in opposition to anterior muscles & balance our lateral muscles), biceps = lateral. *most falls in adults occur posteriorly and on their side. Semitendinosus: longer tendon, 2-joint muscle, origin: ischial tuberosity (blends with long head of biceps femoris) Insertion: medial side of tibia, inferior to tibial tuberosity: **pes a(cid:374)seri(cid:374)us (cid:894)(cid:858)goose(cid:859)s foot(cid:859)(cid:895) = te(cid:374)do(cid:374)s of se(cid:373)ite(cid:374)di(cid:374)osus, gracilis & sartorius, action: extends thigh at hip, flexes leg at knee and medially rotate flexed leg. Innervation: tibial part of sciatic nerve: anterior (tibial) & posterior (fibular) divisions. Semimembranosus: larger muscles fibers that can contract, origin: lateral aspect of ischial tuberosity. Insertion: posteriomedial aspect of tibial condyle: action: extends thigh at hip, flexes leg at knee and medially rotates flexed leg. Biceps femoris: 2 heads: long and short, origin: (long) ischial tuberosity, (short) linea aspera (closer to lateral lip of la)