Thigh Anterior: Femoral N Medial: Obturator N Posterior: Sciatic 2019-09-30¢  PNS: lower limb 1 Lower-limb

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Text of Thigh Anterior: Femoral N Medial: Obturator N Posterior: Sciatic 2019-09-30¢  PNS: lower...

  • 1 PNS: lower limb

    Lower-limb nerves Thigh Anterior: Femoral N Medial: Obturator N Posterior: Sciatic N

    Popliteal fossa Sciatic N → bifurcation

    Leg Anterior: Fibular

    (peroneal) N Posterior: Tibial N

    Tibial nerve

    Fibular nerve

    Right leg

    Ant. view Post. view

  • 2 PNS: lower limb

    Nerves in leg (Anterior)

    Lateral Common fibular n Deep fibular n Superficial fibular n

    Medial Saphenous N (from Femoral N, sensory)

    Saphenous

    medial side

    Right leg (ant. view)

  • 3 PNS: lower limb

    Nerves in leg (posterior)

    Common fibular N from sciatic N Tibial N Sural N (lateral)

    Right leg (post. view)

  • 4 PNS: lower limb

    Lumbar plexus

    from ventral rami of L1-4; with Obturator N (L2-4) Femoral N (L2-4) Lumbosacral trunk (L4-5) Ilioinguinal (L1) Iliohypogastric (L1) Genitofemoral (L1-2) Lat. femoral cutaenous (L2-3)

  • 5 PNS: lower limb

    Lumbar plexus

  • 6 PNS: lower limb

    Femoral nerve

    From lumbar plexus (L2-4), deep to midpoint of inguinal ligament Motor Anterior thigh muscles: Quadriceps femoris

    Sensory Thigh (Anterior-Medial surface)

  • 7 PNS: lower limb

  • 8 PNS: lower limb

    Obturator nerve

    Lumbar plexus (L2-4) through obturator foramen Ant. br: adductor longus,

    adductor brevis, gracillis, pectineus Post. br: obturator ext.,

    adductor magnus Right thigh (ant. view)

  • 9 PNS: lower limb

    Sacral plexus; Lumbosacral plexus ventral rami of S1-4; joined with lower lumbar nerves

    via lumbosacral trunk Sciatic N (L4-S3) Superior gluteal N (L4-S1): gluteus med and min

    (greater trochanter; abduction of hip joint) Inferior gluteal N (L5-S2): gluteus max (gluteal

    tuberosity; extension, lateral rotation of hip joint) Pudendal N (S2-4) Muscular nerves Cutaneous nerves

  • 10 PNS: lower limb

    Lumbosacral plexus

  • 11 PNS: lower limb

    Dermatome of lower limb:

    Principles: Ventral side: Lumbar Dorsal side: Sacral Genital/Perineum:

    Sacral

    Fig 5-12

  • 12 PNS: lower limb

    Dermatome based on embryology

  • 13 PNS: lower limb

    Sciatic nerve

    Right leg (post. view)

  • 14 PNS: lower limb

    Sciatic foramen: Greater and Lesser

    Right hip (post. view)

  • 15 PNS: lower limb

    Greater sciatic foramen Piriformis muscle Sciatic nerve Gluteal nerves Superior gluteal nerve Inferior gluteal nerve

    Pudendal nerve (via lesser sciatic foramen to perineum)

  • 16 PNS: lower limb

    5-23a

    Sciatic nerve

    Piriformis m.

  • 17 PNS: lower limb

    Fibular (Peroneal) nerve

    Muscular innervation for Leg (Anterior and Lateral compartments) Common fibular (peroneal) Deep fibular (peroneal) Plantar extension (dorsiflexion)

    Superficial fibular (peroneal) Eversion

  • 18 PNS: lower limb

    Fibular (Peroneal) nerve

    Right leg (ant. view)

  • 19 PNS: lower limb

    Deep fibular nerve Right leg (post. view)

  • 20 PNS: lower limb

    Tibial nerve

    Muscular innervation for Leg (Post. compartment) Tibial N Plantar flexion

    Medial plantar N Lateral plantar N Toe flexion

    Sural N: some from a branch of tibial N

  • 21 PNS: lower limb

    Tibial nerve

    Lat. plantar

    Med. plantar Sural Right leg (post. view)

  • 22 PNS: lower limb

    Skin innervation of Foot

    Sural

  • 23 PNS: lower limb

    Fibular (Peroneal) nerve injury

    foot-drop (steppage gait): dragging of foot on the floor Loss in Dorsiflexion of ankle Eversion of foot Sensation of leg and foot

  • 24 PNS: lower limb

    (ant. view)

    1. Location (compartment)

    2. Muscles

    3. Functions

    (post. view)

    Lower-limb nerves Nerves in leg�(Anterior) Nerves in leg�(posterior) Lumbar plexus Lumbar plexus Femoral nerve 投影片編號 7 Obturator nerve Sacral plexus; Lumbosacral plexus Lumbosacral plexus Dermatome of lower limb: Dermatome based on embryology 投影片編號 13 Sciatic foramen: Greater and Lesser Greater sciatic foramen Sciatic nerve Fibular (Peroneal) nerve Fibular (Peroneal) nerve Deep fibular nerve Tibial nerve Tibial nerve Skin innervation of Foot Fibular (Peroneal) nerve injury 投影片編號 24