EEOB 2510 Lecture Notes - Lecture 10: Inferior Gluteal Nerve, Gluteus Medius Muscle, Biceps Femoris Muscle
7 Apr 2016
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Plexus- where axons intermix and rearrange to form new nerves; iber regrouping to create new nerves; eliminates the complete paralysis when a part or nerve is damaged. Lumbar plexus (t12 & l1-l4 ventral rami (mixed nerve))- within the proximal atachment of the psoas major muscle. Provides innervaion for the muscles of the anterior and medial thigh. Enters thigh by passing under the inguinal ligament (ligament that runs from the asis to pubic tubericle) Innervates the iliacus (actually sits on), pecineus, and the anterior femoral muscles. Passes through the obturator foramen to enter the medial thigh. Innervates most medial femoral muscles (not pecineus) Sacral plexus (l4-l5 & s1-s4 ventral rami)- lies within the true pelvis (midsagital secion); posterior and lateral aspects. Major branches of sacral plexus- provides innervaion for the muscles of the posterior thigh and all of the leg and foot. Exits pelvis through the greater sciaic foramen superior to piriformis muscle (organizer of the gluteal region)
