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LB muscles, anatomy
223 Exam 2
Question | Answer |
---|---|
the muscles of the quadriceps femorus group | Rectus femoris, Vastus lateralis, Vastus intermedius, Vastus medialis |
abdominal muscles (4) superficial to deep | external oblique, internal oblique, rectus abdominis, tranversus abdominis |
Muscles & function of the erector spinae group (medial to lateral): | Spinalis, Longissimus; Iliocostalis function: extension |
Muscles of the hamstring | location: posterior thigh semimembranosus, semitendinosus, biceps femoris |
muscles of the quadriceps Function? | rectus femoris, vastus lateralis, vastus intermedius, vastus medialis function: lifting - extending leg |
two other important muscles of anterior thigh | sartorius, iliopsoas |
Deep posterior back muscles, movements | Semispinalis(largest, mid thorax to skull base), multifidi (deep fasciculi 1-3 motion segments all up back sacrumm to C2), rotatores (well-defined only in thoracic region) Overall F: extends muscle movement of vertebrae |
Function & location of Quadratus lumborum | flexes trunk laterally, located in lumbar region - cause of back pain if tight |
function & location of psoas & Illiacus | flexors of hip, can cause back pain if tight |
what are the 3 major nerve plexus? | Brachial (C5-8, T1) Lumbar (L1-4); Sacral (L4-S4); |
Nerves of the Brachial plexus | C5-biceps, C6-wrist extensors, C7-triceps, C8-long finger flexors, T1 - intrinsics |
Nerves of the Lumbar Plexus | Femoral - saphenous, Obturator, Lateral femoral cutaneous |
Nerves of the Sacral Plexus | Posterial femoral cutaneous, Superior gluteal, Interior gluteal nerve |