Brain & Cranial Nerves Flashcards
Central Nervous System (CNS)
Brain and spinal cord
Peripheral Nervous System (PNS)
Any nerve or ganglia outside of the CNS
Sensory/Afferent Division
Carries signals to the CNS
Motor/Efferent Division
Carries signals from the CNS to glands and muscle cells
Autonomic Nervous System (ANS)
Carries signals to glands, cardiac muscle, and smooth muscle. Responsible for visceral reflexes
Sympathetic Division
Arouses the body for action/fight-or-flight
Parasympathetic Division
Has calming effect on body/rest and digest
Dura Mater
Tough two-layered sheet of fibrous connective tissue
Subdural Space
Virtual space between the dura and arachnoid membrane
Arachnoid Mater
Web-like structure that secures blood vessels
Subarachnoid Space
CSF-filled space between the arachnoid mater and pia mater
Pia Mater
Thin shiny layer that adheres to the contours of the brain
Sulci/Sulcus
Shallow grooves
Fissures
Deep grooves that separate brain structures
Gyri/gyrus
Thick rounded folds
Cerebrum
Largest part of the brain
Central Sulcus
Divides the frontal and parietal lobes
Lateral Sulci
Separates the temporal and parietal lobes
Longitudinal fissure
Separates the left and right hemispheres
Transverse Fissure
Separates the cerebellum and the occipital lobe
Corpus Callosum
Connects the right and left hemispheres
Cerebral Cortex
Consists of the frontal, parietal, temporal, and occipital lobes