The Central Nervous System Flashcards
THE CENTRAL NERVOUS SYSTEM
Spinal cord? Function?
Cervical enlargement?
Lumbar enlargement?
31 segments each with pair nerves spinal cord conducts nerve impulses and spinal reflexes
Supplies nerves to upper limbs
Supplies nerves to lower limbs
THE CENTRAL NERVOUS SYSTEM
spinal reflexes?
Sensory nerves?
motar nerves?
Reflex arc passes through the spinal cord
Sensory nerves enter through dorsal root ganglia, carry message to brain
Motor nerves exit through ventral root ganglia, carry message from brain
THE CENTRAL NERVOUS SYSTEM
Brain three major parts?
Cerebral hemisphere?
Corpus callosum?
Cerebrum- largest, sensory/motar functions and higher mental function (memory, reasoning)
Cerebellum- coordinate voluntary muscles (balance/ coordination)
Brain stem- regulate visceral functions (automatic systems)
Left/right brain separated by it
Connects the two hemispheres of the brain
THE CENTRAL NERVOUS SYSTEM lobes of the brain? 4?
Cerebral cortex?
Ventricles?
Frontal- reasoning, thinking, language, motar areas, control voluntary muscles
Parietal- touch, temperature, pain, relation of body parts, emotions
Temporal-hearing/vision, memory, interpreting, sensory information
Occipital- vision, interprets visual information
Thin layer grey matter, outermost portion of cerebrum
Fluid filled cavities contain CFS
THE CENTRAL NERVOUS SYSTEM
parts of the brain stem?
Thalamus-relay station
Hypothalamus- hormones, heart rate, blood pressure, body temperature, hunger
Optic tract- optic nerves, cross over each other
Midbrain- visual reflexes, eye movement
Pons- relay sensory information
Medulla- heart, respiration, blood pressure
Pituitary gland- controls hormones
Hippocampus- memory controlled
Limbic system- how all systems work together to control emotion
THE CENTRAL NERVOUS SYSTEM meninges? Dura matter? Arachnoid matter? Pia matter? Cerebrospinal fluid?
Membranes located between bone and soft tissue
Outermost layer, blood vessels and nerves
Middle layer, no blood vessels
Inner most layer, many nerves and blood vessels to nourish cells of brain and spinal cord
Fluid between arachnoid and pia matter
