PHTY100 Lecture Notes - Lecture 8: Lumbosacral Plexus, Lumbar Plexus, Cervical Plexus
Document Summary
Nervous system: highly specialised cells (neurons, transmit info around body, support cells provide protection and nutrition. Pns: nerves that connect cns to peripheral structures: cranial nerves: Nerves that emerge from brain or brainstem. Supply musculoskeletal structures of head and neck: spinal nerves: Each is numbered according to place where it emerges from. 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal. Supply structures of trunk wall and the limbs. Sensory distribution: to skin- pressure, hot, cold, pain, touch, to joints- sensations of joint position (proprioception, where a nerve supplies a muscle that moves a particular joint, that nerve will also supply that joint. Motor distribution: to muscles- turns muscle on, makes it contract, to glands- increases secretion from gland, supply to sweat glands produces sweating. Lumbar and lumbosacral plexi: genitofemoral nerve, lateral femoral cutaneous nerve, femoral nerve l234, obturator nerve l234, posterior femoral cutaneous nerve, sciatic nerve l45 s123, lumbosacral trunk.
