Neuroanatomy Flashcards
Automatic nervous system
Involuntary control
Tract
Bundle of axons in CNS
Nuclei
(CNS) Mass containing cell bodies of nerve cells
Nerve
(PNS) bundle of axons
Ganglia
(PNS) mass containing cell bodies of nerve cells
White matter
Myelinated axons that transmit info
Gray matter
Made of cell bodies and unmyelinated dendrites
Collects info
Dorsal
Towards back
Ventral
Towards stomach
Quadriplegia
Inability to control all four limbs and respiration (damage to upper cervical)
Sensory neurons
Dorsal
Deliver info to CNS
Motor neurons
Ventral
Distribute commands to peripheral effectors
Inter neurons
Inhibit info or coordinate responses
Neuronal pools
Functional group of interconnected neurons
Divergence
Info comes from a specific place and goes out to other parts of the brain
Convergence
Narrowing down the neurons to a more specific place
Serial processing
Structure goes in a circuit (slow)
Parallel processing
Structures do different things at different rates (fast)
Reverberation
Something repeated over and over again
Ex. Memory
Sympathetic nervous system
Prepare organs for vigorous activity
Fight or flight
Parasympathetic nervous system
Facilitates no emergency responses and conserves energy
Brainstem
Medulla, pons and midbrain
Medulla
Hindbrain
Controls vital functions and reflexes
Pons
Hindbrain
Axons from each half of brain cross to opposite side of spinal cord, so left hemisphere controls right side of body and vice versa
Regulates sleep
Cerebellum
Hindbrain
Controls coordination, movement, balance, timing
Ventricles
Hold cerebrospinal fluid
Ascending reticular activating system
Hindbrain
Interconnected network for arousal
Activated parts of brain that will receive message
Locus coeruleus
Group of cell bodies that manufacture almost all adrenaline in brain