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The hamstrings are innervated by the sciatic nerve, specifically by a main branch of it: the tibial nerve. (The short head of the biceps femoris is innervated by the common fibular nerve). The sciatic nerve runs along the longitudinal axis of the compartment, giving the cited terminal branches close to the superior angle of the popliteal fossa.
However, there is an inhibitory interneuron used to relax the antagonistic hamstring muscle (reciprocal innervation). This test of a basic automatic reflex may be influenced by the patient consciously inhibiting or exaggerating the response; the doctor may use the Jendrassik maneuver in order to ensure a more valid reflex test.
The three 'true' hamstrings cross both the hip and the knee joint and are therefore involved in knee flexion and hip extension. The short head of the biceps femoris crosses only one joint (knee) and is therefore not involved in hip extension. With its divergent origin and innervation, it is sometimes excluded from the 'hamstring ...
hamstring: 2 1 vastus medialis: Lower limb, Thigh, Anterior compartment anteromedial surface of femur: patella and tibial tuberosity via patellar tendon: femoral artery: femoral nerve: extends knee: hamstring: 2 1 biceps femoris: Lower limb, Thigh, Posterior compartment/hamstring ischial tuberosity (long head), linea aspera of femur (short head ...
The muscle is supplied by the inferior gluteal nerve which arises from the dorsal branches of the ventral rami of the fifth (L5), the first and second sacral nerves. [2]The lumbosacral trunk, which is made up of L5 and a small branch of L4, effectively connects the lumbar and sacral plexuses. [3]
The signal will travel through the anterior root of L4 and into the anterior rami of the L4 nerve, leaving the spinal cord through the lumbar plexus. The posterior division of the L4 root is the femoral nerve. The femoral nerve innervates the quadriceps femoris, a fourth of which is the rectus femoris.
"Knots Untie" is the eleventh episode of the sixth season of the post-apocalyptic horror television series The Walking Dead, which aired on AMC on February 28, 2016. The episode was written by Matthew Negrete and Channing Powell, and directed by Michael E. Satrazemis.
Eric Goldman at IGN gave the episode 9.3 out of 10, saying "this was another great episode for The Walking Dead and a strong end to this half of the season. In Season 3, The Walking Dead has turned into a show that is perhaps less grounded and “realistic”—in the midst of its genre scenario—than it once felt, but this is easily the most ...