Psych 202: Nervous System Structure Flashcards
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Anterior
Rostral
Toward the nose
Neuraxis
A line drawn through the CNS from the rostral to the caudal parts of the body
Posterior
Caudal
Toward the tail (feet in humans)
Rostral
Anterior
Caudal
Posterior
Dorsal
Toward the back
Ventral
Toward the belly
Superior
Above
Inferior
Below
Lateral
Away from the midline
Medial
Toward the midline
Ipsilateral
Same side
Contralateral
Opposite sides
Coronal Plane
Frontal Plane or Transverse Plane
Dives the body or brain into ventral/front and dorsal/back parts
Sagittal Plane
The plane that bisects the body or brain into right and left portions
Horizontal Plane
The plane that divides the body or brain into upper and lower parts
Meninges
The three protective sheets of tissue that surround the brain and spinal cord
Dura mater
Arachnoid membrane, subarachnoid space
Pia mater
Ventricles
Openings in the brain that produce and contain cerebral spinal guild (CFS)
Cerebral Spinal Fluid (CFS)
Fluid that fills cerebral ventricles and helps to support the brain
Choroid Plexus
A highly vascular portion of the lining of the ventricles that produces/secret CFS
Stroke
A blockage or rupture of vessels that supply blood to the brain that results in damage to that region
Brain Imaging Techniques
Angiography Computerized axial tomography (CAT) Magnetic resonance imaging (MRI) Position emission tomography (PET) Funtional MRI (fMRI) Optical imaging Transcranial magnetic stimulation (TMS) Magnetoenocepjalography (MEG)
Neural Tube
An embryonic structure with subdivisions that correspond to the future forebrain, midbrain, and hindbrain. The cavity of this tube will include the berebral ventricles and the passages that connect them
Ventricular Zone
Ependymal layer
A region lining the cerebral ventricles that displace mitosis, providing neurons early in development and glial cells throughout life
Founder cells
Initial cells in the ventricular zone
First divide symmetrically, then asymmetrically with one founder and one neuron
Forebrain
Prosencephalon
The frontal division of the neural tube, containing the cerebral hemispheres, the thalamus and the hypothalamus
“higher thinking” “upper division processing”
Telencephalon
The oral subdivision of the forebrain that includes the cerebral hemispheres when fully developed
Cerebral Cortex
Cortex
The outer covering of the cerebral hemispheres, which consists largely of nerve cell bodies and their branches
Gyrus
A ridged or raised portion of a convoluted brain surface
Sulcus
A furrow of a convoluted brain surface
Small groves between gyri
Fissure
Large grooves between gyri
Frontal Lobe
The most anterior portion of the cerebral cortex
Primary Motor Cortex
Precentral gyrus
Controls motor output
Somatotopic Organization
Parts are organized along the portion of the brain and given more or less spaced based on the complexity of the movements they make of senses they pick up
Motor Association Cortex
Anterior to PMC
Plans movement
Prefrontal Cortex
Rostral end of the brain
Organization of thought, planning actions, and higher cognitive functions
Parietal Lobe
Large regions of cortex lying between the frontal and occipital lobes of each cerebral hemisphere
Primary Somatosensory Cortex
The gyrus just posterior to the central sulcus where sensory receptors on the body surface are mapped. Primary cortex for receiving touch and pain information, in the parietal lobe.
Somatosensory Association Cortex
Where information from the primary somatosensory cortex is sent to be interepeted and analyzed
Temporal Lobe
Large lateral cortical regions of each cerebral hemisphere, continuous with the parietal lobes posteriorly, and separated from the frontal lobes by the Sylvian fissure (lateral fissure). The temporal lobes contain the hippocampus and amygdaloid, and are involved in a variety of functions, including memory, emotional processing, and the olfactory and auditory senses.
Primary Auditory Cortex
Audio information from the senses sent here
Auditory Association Cortex
Auditory information sent here for analyzing
Occipital Lobe
Large regions of cortex covering much of the posterior part of each cerebral hemisphere, and specialized for visual processing
Primary Visual Cortex
The region of the occipital cortex where most visual information first arrives
Visual Association Cortex
Visual information sent here for analyzing
Corpus Callosum
The connection between the left and right hemispheres of the brain, major in coordination
Limbic System
A loosely defined, widespread group of brain nuclei that innervate each other to form a network.
Emotions
Cingulate Cortex
Cingulate gyrus, cingulum
A region of medial cerebral cortex that lies dorsal to the corpus callosum
Emotion, learning, memory
Amygala
A group of nuclei in the medial anterior part of the temporal lobe
Emotion, learning, memory
Hippocampus
A medial temporal lobe structure that is important for learning and memory
Mammillary Bodies
A pair of nuclei at the base of the brain
Memory
Fornix
A fiber tract that extends from the hippocampus to the mammillary body
Connection
Basal Ganglia
A group of forebrain nuclei, including caudate nucleus, globus pallidus, and putamen, found deep within the cerebral hemispheres
Movement
Striatum
Caudate nucleus
Putamen
Caudate nucleus
A basal ganglia that has a long extension or tail
Putamen
Basal ganglia
Globus Pallidus
Basal ganglia
Diencephalon
The posterior part of the forebrain, including the thalamus and the hypothalamus
Thalamus
Composed of nuclei that relay information to the proper areas
Top of the brain stem
Projection Fibers
Afferent and efferent parts of the spinal cord
Hypothalamus
Controls the endocrine system and the automatic nervous system
Anterior Pituitary
Stres, growth, reproduction, lactation
Posterior Pituitary
Endocrine system
Midbrain/Mesencephalon
Structurally and evolutionarily between the fore and hindbrain
Tectum
Tegmentum
Tectum
Dorsal mesencephalon
Superior colliculi
Inferior colliculi
Superior Colliculus
Muscle coordination
Eye movement
Inferior Colliculus
Auditory
Tegmentum
Ventral mesencephalon
Reticular formation
Periaqueductal grey matter
Substantia nigra
Ventral tegmental area
Substantia Nigra
Generation, motivation of movement
Makes dopamine to excite the basal ganglia
Ventral Tegmental Area
Make dopamine for limbic reward system
Periaqueductal Grey
Pain
Species specific behaviors
Reticular Formation
Arousal
Hindbrain
Most primitive function
Basic survival skills
Surrounds fourth ventricle
Metencephalon
Myelencephalon
Metencephalon
Cerebellum
Pons
Cerebellum
Integrates sensory and motor information to coordinate movement
Pond
Projects information for cortex to cerebellum
Sleep and arousal
Myelencephalon
Medulla oblongata
Caudal most
Cardiovascular, respiration, muscle tone, arousal
Medulla
Medulla oblongata
Caudal most
Cardiovascular, respiration, muscle tone, arousal
Spinal Cord
Part of the CNS
At the back of the head
Grey Matter
Areas of the brain that are dominated by cell bodies and devoid of myelin
White Matter
A shiny layer underneath the cortex that consists largely of axons with white myelin sheaths
Dorsal Horn
Contains the sensory afferent and the dorsal root ganglion, dorsal root
Ventral Horn
Contains the motor efferent, ventral root
Efferent
Motor output
Afferent
Sensory input
Dorsal Root
Carries sensory information from the PNS to the CNS
Cell bodies are in the dorsal root ganglion (outside of CNS)
Dorsal Root Ganglion
Where the dorsal root cell bodies are.
Part of the PNS
Ventral Root
Carries motor messages from the spinal cord to the PNS
Cranial Nerves
12 pairs
Some sensory, some motor, some both
Sensory and motor functions of the head, neck, face and throat
Somatic NS
PNS
Sensory input and motor control
Autonomic NS
PNS
Sympathetic and parasympathetic nervous system
W have little control or awareness of
Sympathetic NS
Fight or flight
Utilization of energy resources
Parasympathetic NS
Rest and digest
Conservation of energy resources
Preganglionic Neurons
Before the ganglion
The neurons in the autonomic nervous system that run from the central nervous system to the autonomic ganglia
Postganglionic Neurons
After the ganglion
The neurons in the autonomic nervous system that run from the autonomic ganglion to the various targets in the body
Recovery After Brain Injury
The recovery of behavioral capacity following brain damage from stroke or injury