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52-year-old female has muscle weakness. Recently tripped and hurt her knee…

- - - - Postcentral Gyrus
      - Precentral Gyrus
    - - Central Sulcus
- - - - Cervical plexus
      - Lumbar plexus
      - Brachial plexus
      - Sacral plexus
    - - Tibial Nerve
      - Sciatic nerve
      - Obturator nerve
      - Femoral nerve
      - Common fibular nerve
    - - Ulnar Nerve
      - Radial nerve
      - Phrenic nerve
      - Musculocutaneous nerve
      - Median nerve
      - Axillary nerve
  - - - Dorsal gray horn
      - Lateral gray horn
      - Ventral gray horn
    - - Cervical Enlargement
      - Lumbar Enlargement
    - - Arachnoid Mater
      - Dura Mater
      - Pia Mater
- - - - 1st order neuron
      - 2nd order neuron
      - 3rd order neuron
  - - - Upper motor neuron
      - Lower motor neuron
- - - - Postcentral Gyrus
        
        Location of the primary sensory area, which is involved in many of the body's sensory function - posterior to the central sulcus.
      - Precentral Gyrus
        
        Location of the primary motor area, which regulates many of the body's motor function - anterior to the central sulcus.
    - - Central Sulcus
        
        Bridges primary motor cortex and primary sensory cortex - separates frontal lobe anteriorly from the parietal lobe posteriorly.
  - - - responsible for processing the senses of hearing and smell.
    - - involved with memory and interpretation of taste - located deep to the temporal lobe.
    - - process visual information and stores visual memories.
    - - involved with the general sensory functions.
    - - involved with motor functions, concentration,decision making, & personality.
- - - - Cervical plexus
        
        Innervates head and neck
      - Lumbar plexus
        
        gives innervation to the lower extremities
      - Brachial plexus
        
        gives innervation to the upper back, shoulder, arms, and hand.
      - Sacral plexus
        
        gives innervation to the back of the thigh, leg, bottom of the foot, as well as the pelvis
    - - Ulnar nerve
        
        Serves forearm flexors
      - Axillary nerve
        
        Innervates upper shoulder
      - Median nerve
        
        Runs length of each pup extremity and serves hand & forearm flexors
      - Radial nerve
        
        Innervates triceps brachii and extensors of hand
      - Musculocutaneous nerve
        
        Innervates muscles of arm
      - Phrenic nerve
        
        Runs to diaphragm; responsible for diaphragm contraction in breathing
    - - Tibal Nerve
        
        provides innervation to the muscles of the lower leg and foot.
      - Sciatic nerve
        
        Innervate pelvis and muscles that move the hip, thigh, and leg
      - Obturator nerve
        
        Innervates adductor muscles
      - Femoral nerve
        
        innervates the legs ; principal function is to carry instructions to the muscles that straighten the leg, such as the quadriceps
      - Common fibular nerve
        
        Innervates the muscles of the anterior compartment of the leg; tibialis anterior, extensor digitorum longus and extensor hallucis longus
  - - - tapered end of spinal cord
    - - enlargement along the dorsal root where sensory neuron cell bodies are found
    - - extension of pia matter that attaches spinal cord to coccyx
    - - Cervical Enlargement
        
        bulge in spinal cord containing cell bodies of motor neurons supplying upper limb
      - Lumbar Enlargement
        
        bulge in spinal cord at T9-T12
    - - conatins cerebrospinal fluid (CSF) ; located in the middle.
    - - Protective three layers of connective tissue that surround the spinal cord and brain
        
        Arachnoid Mater
        
        Dura Mater
        
        Pia Mater
        
        attached to spinal cord.
    - - Collection of spinal nerves that arise from inferior end of spinal cord
    - - bundle of motor neurons that leaves the anterior side of the spinal cord to travel to muscles and glands.
    - - columns of myelinated axons on outer surface of spinal cord, surrounds gray matter horns.
    - - contains neuron cell bodies,dendrites, & unmyelinated axons
        
        Dorsal Gray Horns
        
        contains interneruons ; located in the gray matter is posterior in the spinal cord
        
        Ventral Gray Horn
        
        contains the cell bodies of motor neurons traveling to skeletal muscles ; located in the gray mater ; anterior in spinal cord.
        
        Lateral Gray Horn
        
        has autonomic motor neurons ; located in gray matter and is lateral in spinal cord.
    - - bundle of sensory neurons that enters posterior side of spinal cord.