Kinesiology 2222A/B Study Guide - Final Guide: Trochanter, Iliotibial Tract, Anterior Inferior Iliac Spine

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Although only 4 can be seen, there are 5 different muscle groups; the gluteus is big enough to be separated into gluteus maximus and gluteus medius/minimus. The nerves that innervate these muscles come from the lumbar and sacral plexuses. The lumbar plexus has two main nerves: femoral & obturator; the obturator runs through the obturator foramen while the femoral nerve is the large anterior nerve in the thigh. The sacral plexus has gluteal, sciatic, common fibular & tibial. Sciatic nerve: it"s the thi(cid:272)k o(cid:374)e (cid:894)e(cid:454)te(cid:374)sio(cid:374) (cid:272)ord(cid:895); (cid:272)o(cid:374)sta(cid:374)t pressure is pla(cid:272)ed o(cid:374) this (cid:374)er(cid:448)e (cid:271)e(cid:272)ause it"s so (cid:271)ig he(cid:374)(cid:272)e the stru(cid:272)tures it i(cid:374)(cid:374)er(cid:448)ates te(cid:374)d to ti(cid:374)gle a(cid:374)d get sore. Very few insertion points on the anterior femur; however, lots of insertion points (attachments) on the posterior side. Psoas major & minor: origin: base of the transverse processes of the lumbar vertebrae (l1-l5) Innervation: femoral nerve: function: flex & laterally rotate thigh & flex trunk.