Neuroanatomy Review (1) Flashcards
Division of the nervous system composed of the brain and spinal cord.
CNS
Division of the nervous system composed of cranial and spinal nerves.
Somatic nervous system
What are the two divisions of the autonomic nervous system?
Sympathetic (arousing), parasympathetic (calming)
Which division of the nervous system controls the gut?
Enteric nervous system
Sensory information goes into CNS (incoming)
Afferent information
Motor information leaves CNS (outgoing)
Efferent information
Orientation: Above/towards the top
Dorsal/superior
Orientation: Below/towards the bottom
Ventral/Inferior
Orientation: Towards/at the middle
Medial
Orientation: Towards/at the side
Lateral
Orientation: In front of
Anterior/rostral
Orientation: In back/behind
Posterior/caudal
Orientation: From the front
Frontal
Slice: Axial/horizontal/transverse
Dorsal/ventral
Slice: Sagittal
Medial
Slice: Coronal
Frontal
Three layers of protective tissue that encase the brain and spinal cord that protects the nervous system
Meninges
What are the three divisions of the meninges?
Dura mater (outer), arachnoid layer (middle), pia mater (inner)
Colourless solution made of various salts and ions that fills the ventricles and circulates around the brain and spinal cord in the subarachnoid space
Cerebral spinal fluid (CSF)
Inflammation of the meninges (particularly in the pia mater and arachnoid layer and the CSF between them)
Meningitis
Major structure of the forebrain with two “identical” left and right hemispheres that is responsible for most conscious behaviours
Cerebrum
Little brain, major brainstem structure specialized in learning and coordinating movement and balance
Cerebellum
Small protrusions on the folded cortex
Gyri/Gyrus
Grooves/valleys of the cortex
Sulci/Sulcus
What are the three main fissures?
Longitudinal, lateral, parieto-occipital
Thin sheet of nerve tissue folded multiple times to fit inside the skull
Cerebral cortex
What is the main function of the frontal lobe?
Executive function
What is the main function of the parietal lobe?
Spatial, touch, vision (in relation to space)
What is the main function of the temporal lobe?
Language (left), music (right)
What is the main function of the occipital lobe?
Primary vision processing
Major structures of the brain responsible for most unconscious behaviours
Brainstem
What are the three major cerebral arteries?
Anterior, middle and posterior
Sudden appearance of neurological symptoms as a result of severe interruption of blood flow
Stroke
What are the two main cell types in the nervous system?
Neurons and glial cells
A group of cells forming a cluster that can be identified with special stains and form a functional grouping
Nucleus
Fibre of a neuron that carries messages to other neurons
Axon
Large collection of axons coming together outside the CNS
Nerve
Large collection of axons coming together inside the CNS
Tract
Regions primarily made up of cell bodies and blood vessels
Grey matter
Areas rich in fat-sheathed (myelinated) neural axons
White matter
Largest white matter tract in the brain that connects the two cerebral hemispheres to provide a route of direct communication
Corpus callosum
Wing-shaped cavities that contain CSF to cushion the brain
Ventricles
What are three roles of CSF?
Allowing certain compounds access to the brain
Removing waste
Cushions from injury
Several spinal segments that execute most body movements and can sometimes act independently of the brain
Spinal cord
What is the primary function of the hindbrain?
Motor
What are the four main components of the hindbrain?
Cerebellum, reticular formation, pons, medulla
What is the primary function of the midbrain?
Sensory
What are the two major divisions of the midbrain?
Tectum (sensory), tegmentum (motor)
What is the function of the diencephalon?
Sensorimotor integration
What are the two major structures of the diencephalon?
Thalamus and hypothalamus
Largest and most recently evolved region of the brain
Forebrain
Part of the forebrain that regulates most brain activities
Cerebral cortex (neocortex)
Which properties distinguish the six cortical layers?
Density, cell type and function
Regions of the cerebral cortex defined by their cytoarchitecture, or organization of cells
Broadman areas
Part of the forebrain that is responsible for control of voluntary movement
Basal ganglia
What are the three main structures of the basal ganglia?
Caudate nucleus, putamen, globus pallidus
Part of the forebrain that regulates emotions and behaviours that produce/require memory
Limbic system (allocortex)
What are the three principle components of the limbic system?
Amygdala, hippocampus, cingulate cortex
What are the afferent functions of the SNS?
Sensory inputs
What are the efferent functions of the SNS?
Motor control
What are the five anatomical regions of the spinal cord?
Cervical, thoracic, lumbar, sacral, coccygeal
How many pairs of spinal nerves are there?
31
What does the law of Bell and Magendie describe?
Dorsal/posterior root fibres are afferent
Ventral/anterior root fibres are efferent