Course
The nerve to quadratus femoris is a sacral plexus nerve. It arises from the ventral divisions of the fourth and fifth lumbar and first sacral nerves: it leaves the pelvis through the greater sciatic foramen, below the piriformis muscle, and runs down in front of the sciatic nerve, the superior and inferior gemellus muscles, and the tendon of the obturator internus, and enters the anterior surfaces of the muscles; it gives an articular branch to the hip-joint.
This article incorporates text from a public domain edition of Gray's Anatomy.
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Nerves of lower limbs and lower torso: the lumbosacral plexus (L1–Co) (TA A14.2.05–07GA 9.948)
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lumbar
plexus
(L1–L4) |
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iliohypogastric
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- lateral cutaneous branch
- anterior cutaneous branch
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ilioinguinal
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- anterior scrotal ♂/labial ♀
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genitofemoral
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- femoral branch/lumboinguinal
- genital branch
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lateral cutaneous
of thigh
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obturator
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- anterior (cutaneous)
- posterior
- accessory
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femoral
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- anterior cutaneous branches
- saphenous (infrapatellar
- medial crural cutaneous)
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sacral
plexus
(L4–S4) |
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sciatic
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common
fibular
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- lateral sural cutaneous (sural communicating branch)
- deep fibular (lateral terminal branch
- medial terminal branch
- dorsal digital)
- superficial fibular (medial dorsal cutaneous
- intermediate dorsal cutaneous
- dorsal digital)
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tibial
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- medial sural cutaneous
- medial calcaneal
- medial plantar (common plantar digital nerves
- proper plantar digital)
- lateral plantar (deep branch
- superficial branch
- common plantar digital
- proper plantar digital)
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sural
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- lateral dorsal cutaneous
- lateral calcaneal
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other
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- muscular: superior gluteal/inferior gluteal
- lateral rotator group (to quadratus femoris
- to obturator internus
- to the piriformis)
cutaneous: posterior cutaneous of thigh (inferior cluneal
- perineal branches)
- perforating cutaneous
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coccygeal
plexus
(S4–Co) |
- pudendal: inferior anal
- perineal (deep
- posterior scrotal ♂/labial ♀)
- dorsal of the penis ♂/clitoris ♀
anococcygeal
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- cutaneous innervation of the lower limbs
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M: PNS
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anat (h/r/t/c/b/l/s/a)/phys (r)/devp/prot/nttr/nttm/ntrp
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noco/auto/cong/tumr, sysi/epon, injr
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proc, drug (N1B)
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