Four parts:
Cervical, thoracic, lumbar, sacral
Somatic vs visceral sensory nuclei
Receive signals from skin, muscle, joints vs receive signals from blood vessels
Signals related to crude touch, pressure, pain, and temp
Anterolateral pathway
Helps control reflexes related to posture and balance
Reticulospinal tracts
Brachial plexuses is a network of fibers extending from ____ to ____
neck to axilla
Cablelike bundle of axons
Nerve
Three regions of white matter:
Posterior funiculus, lateral funiculus, and anterior funiculus
Signals about proprioception with a two neuron chain
Spinocerebellar pathway
Help maintain balance during sitting, standing, walking
Vestibulospinal tract
What is the longest nerve in the body?
Sciatic
Where does each spinal nerve exit?
Intervertebral foramen
Sensory pathways go _____ brain and motor pathways go _____ brain
Toward, from
What controls effectors such as skeletal muscles?
Motor pathways
Segment of skin supplied by single spinal nerve
Dermatomes
Neural pathway responsible for generating the response
Reflex arc
Three layers of meninges:
Pi mater, arachnoid mater, dura mater
Detect stretch in joints, muscles, tendons
Proprioceptors
Pathway between brain and skeletal muscles
Direct pathway
Network of interweaving anterior rami of spinal nerves
Nerve plexus
What prevents muscles from contracting excessively?
Golgi tendon reflex
What is gray matter made of?
Neuron's cell bodies, dendrites, and unmyelinated axons, glial cells
Signals about proprioception, touch, pressure, and vibration with a three neuron chain
Posterior funiculus
Upper motor neurons originate in brainstem nuclei and take complicated route to spinal cord
C1-C4 makes up what?
Cervical pelxus
Crossed extensor reflex
Allows opposite side limb to support body weight while hurt limb withdrawls