Pleksus Lumbosakral

Oleh : Nuryasin KurniawanPembimbing : dr. Sugeng Yuwono SpOT

Dermatomal Sensory Testing

LUMBAR PLEXUS (Deep to Psoas muscle) ANTERIOR DIVISION

   1.    Subcostal (T12):Sensory: Subxiphoid region Motor: NONE

   2.    Iliohypogastric (L1):Sensory: Above pubisPosterolateral buttocks Motor: Transversus abdominusInternal Oblique    3.    Ilioinguinal (L1):Sensory: Inguinal region Motor: NONE    4.    Genitofemoral (L1-2): pierces Psoas, lies on anteromedial surface.Sensory: Scrotum/mons Motor: Cremaster

   5.    Obturator (L2-4): exits via obturator canal, splits into anterior & posterior divisions.

Sensory: Inferomedial thigh via cutaneous branch of Obturator nerve Motor: External obliqueAdductor longus (anterior division)Adductor brevis (ant & post division)Adductor magnus (posterior division)Gracilis (anterior division)Obturator externus (posterior division)

   6.    Accessory Obturator (L2-4): inconsistentSensory: NONE Motor: Psoas

POSTERIOR DIVISION

   7.    Lateral Femoral Cutaneous [LFCN](L2-3)

Sensory: Lateral thigh Motor: NONE

   8.    Femoral (L2-4): lies between psoas major and iliacus

Sensory: Anteromedial thigh via anterior intermediate cutaneous nervesMedial leg & foot via medial cutaneous nerves (Saphenous Nerve) Motor: PsoasIliacusPecineusQuadriceps Rectus femoris Vastus lateralis Vastus intermedialis Vastus MedialisSartoriusArticularis genu

Lumbar and Sacral Motor Root Function

Lumbar and Sacral Motor Root Function

Reflex Examination

Bulbocavernosus Reflex

Thank you