PSYC2307 Midterm Flashcards
Human Neuropsychology
Scientific Study
Brain-Behaviour Relationship
Clinical Neuropsychology
Diagnosis, Rehabilitation, planning, long-term prognosis of abnormal brain-behaviour relationships
Goals of Neuropsychology
How NS relates to experience and behaviour
Functional relationship amongst brain structures
Rostral
Towards the Nose
Caudal
Towards the Tail
Dorsal
Towards the Back of Spine or Top of Head
Ventral
Towards the Front of Spine or Bottom of Head
Coronal Plane
Brain split with Front Anterior and Posterior
Anterior
Infront of
Posterior
Behind
Lateral
Side
Medial
Midline
Superior
Above
Inferior
Below
Horizontal (Axial) Plane
Brain split with Ventral and Dorsal
Sagittal Plane
Brain split with two lateral sides (Left and Right)
Nucleus
Cluster of cell bodies in the CNS
Ganglion
Cluster of cell bodies in the PNS
Ipsilateral
Structures on the same side
Contralateral
Structures on the opposite side
Bilateral
Structures in both hemispheres
Nerve
Collection of neuron axons in the PNS
Tract
Collection of neruon axons in the CNS
Efferent
Directed away from the brain (motor nerves)
Afferent
Directed towards the brain (sensory nerves)
Convention for compounding terms?
Prefix = Origin of nerve signal - Suffix = termination of nerve signal
Corticospinal Tract
Descending spinal tract which starts in the cortex and synapses in the spine
Nuclei
Gross Anatomy: well-defines group of neuron cell bodies
Neurons
The functional cell of the nervous system for information transfer
Sensory Neuron
Carrying information from receptors to the brain
Motor Neurons
Carrying signals from the brain to muscles
Interneurons
Convey information between different types of neurons
Graded Potential
Signal amplitude proportional to stimulus intensity
Action Potential
Signal frequency proportional to stimulus intensity
All-or-none
Signals between neurons are ___________
Chemical
Properties of a Neurotransmitter
Synthesized in neuron Released into synaptic cleft Bind to receptors Decomposed by enzymes Bind to autoreceptors
Result of Synaptic Transmission
Post Synaptic Potentials
Change in electrical properties of the receiving neuron
Excitatory Post Synaptic Potential - EPSP
Created in the dendrites of neuron and increase likelihood of an Action Potential
Inhibitory Post Synaptic Potential - IPSP
Created closer to the soma of a neuron and decrease the likelihood of an Action Potential
Glial Cells
Astrocytes - Supporting cells
Microglia - Immune cells
Ependymal - Line ventricles
Myelin - Oligodendrocytes and Schwann Cells
Brain Blood Supply
Left and Right Carotid Arteries and Vertebral Arteries ascend in the neck and enter the skull through the foramen magnum to supply blood to the brain parenchyma
Telencephalon
Cerebral Hemisphere - Cerebral cortex, subcortical white matter tracts, basal ganglia, basal forebrain nuclei
Diencephalon
Thalamus, Hypothalamus
Mesencephalon
Cerebral Peduncles, Midbrain Tectum, Midbrain Tegmentum
Metencephalon
Pons, Cerebellum
Myelencephalon
Medulla
Forebrain
Neocortex Basal Ganglia (subcortical) Limbic System (subcortical)
Neocortex
Part of the Cerebral Cortex Expanded the most during evolution 80% of human brain 6 neuronal layers Two hemispheres
Allocortex
3 layers
Smaller area of the cerebral cortex
Hippocampus, olfactory bulb
Fissure
Cleft in the cortex that is deep enough to indent the ventricles
Sulcus
A shallow cleft in the cortex
Gyrus
Ridge in the cortex
Layers of the Cerebral Cortex
Layer VI and V - Send axons to other brain areas, particularly large and distinctive in the motor cortex
Layer IV - Receives axons from sensory systems, small densely packed cells
Layer III, II, I - Receive input from layer IV