Vocab Flashcards
Central nervous system
Consists of the brain and spinal cord
Cephalization
Evolutionary development of the rostral (anterior) portion of the CNS
Increased number of neurons in the head
Highest level is reached in the human brain
Gyri
The ridges in the brain
Sulci
The shallow grooves in the brain
Longitudinal Fissure
Separates the the two hemispheres
Transverse Cerebral Fissure
Separates the cerebrum and the cerebellum
Central sulcus
Separates the precentral gyrus of the frontal lobe and the postcentral gyrus of the parietal lobe
Parietooccipital Sulcus
Separates the parietal and occipital lobes
Lateral sulcus
Separates parietal and temporal lobes
Insula
The layer under the medial surface
Cerebral cortex
Thin superficial layer of gray matter
Motor areas
Primary (somatic) motor cortex;Premotor cortex;Broca’s area; Frontal eye field
Primary motor cortex
Large pyramidal cells of the precentral gyri
Pyramidal cells
Brain neurons with many many dendrites;triangle shaped
Premotor cortex
Plays a role in direct behavior
Broca’s area
Controls muscles of the tounge
Frontal eye field
Controls voluntary eye movement
Sensory areas
Conscious awareness of sensation
P.somatosensory cortex
Receives sensory information, interprets where it’s from
Associaction cortex
Integrates sensory input from p.somatonsory cortex
P. visual cortex
Receives visual information from retinas, post exp to interpret visual stimuli
Auditory association area
Stores memories of odors
Gustatory cortex
Perception if tast
Visual sensory area
Conscious perception of visceral sensations
Vestibular cortex
Balance center
Multimodal association areas
Gives meaning to info,stores memory
Post association area
Recognizes patterns and faces
Anterior association area
Contains memory for judgement/conscience
Limbic association area
Emotional impact to establish memories
Lateralization
Division of labor between hemispheres
Cerebral dominance
Designates dominate language hemisphere
C white matter
Mylelated fibers responsible or communication
Commissural fibers
Connects two hemishoeres
Corpus callosum
Divides cerebral hemispheres
Association fibers
Connects different parts if the same hemisphere
Projection fibers
Hemispheres to the spinal cord
Basal nuclei
Subcortial nuclei, regulates attention, cognition, movements
Diencephalon
3rd ventricle: thalamus,hypothalamus,pineal gland
Thalamus
80% of diencephalon- gateway to cerebral cortex;sorts,edits, releases info
Hypothalamus
Autonomic control and emotional responses, regulates sleep
Pituitary gland
Controls hormone release
Pineal gland
Secrets melatonin
Epithalamion
Roof of 3rd ventricle
Midbrain
Between diencephalon and pons
C. Pendundes
Contains pyramidal motor tracts
Corpora quadrigemina
Domelike dorsal protrusions
Substantia nigra
Linked to basal nucle
Red nucleus
Relay nuclei info, builds eyeballs
Pons
Connects brain centers to spinal cord
Medulla oblongata
Automotic reflex center-cardiovascular,respiratorg
Cerebellum
Provides precise timing for muscle movements
Cerebellum
Provides precise timing for muscle movements
Purkinje cells
Primary neuron cell in myocardium, very large
Arbor vitae
Treelike pattern of white matter in cerbellum
Limbic system
Emotional or affective brain
Amygdale
Recognizes fear and facial expressions
Psychosomatic illness
Illness with amental side effects and symptoms
Reticular formation
Sends impulses to cerebral cortex or keep it conscious/alert
EEG
records electric brain wave activity
A waves
Idling brain
B waves
Mentally alert
T waves
Irregular sporadic
D waves
Seen in deep sleep/anasthesin;may indicate brain change
Aura
Sensory hallucinations
Consciousness
Perception of sensation/ initiation if control movement
Non-remsleep
Restorative sleep; 4 stages
REM sleep
Dreaming, information purge
Memory
Storage and retrieval of information
S-t memory
Temporary holding of information working memory of a few things
L-t memory
Limitless capacity, takes time to transfer from STM
Declarative memory
Factual knowledge
Memory consolidation
Hippocampus and temporal lobes access memory
Procedural memory
Basal nuclei relay input to the thalamus/ peremptory cortex
Motor memory
Involves cerebellum
Emotional memory
Involved amygdala
Meninges
Membranes protecting the CBS
Dura mater
Strongest layer; limits excessive brain movement
Arachnoid mater
Middle,weblike layer that keeps CSF moving
Pia Mater
Vascularized connective tissue that clings to the brain
Cerebrospinal fluid
Clear-watery fluid fills Soave with pia and arachnoid mater
Blood-brain barrier
Barrier with tissues and circulating blood/CNS
Spinal cord
Bundle of nerve fibers enclosed in spine
Alar plate
Neural structure in embryonic system
Basal plate
Flat structure or layer protection of the nerves
Spinal dura mater
Three layers of meninges protecting cord
Epidural space
The outermost part in the spinal column
Lumbar puncture
Therapeutic removal of centesis fluid
Perephrial nervous system
The nervous system outside the brain and spinal cord
Mechanore ceptors
Sense organ the responds to mechanical stimulus
Thermore ceptors
Sensory receptor responds to heat and cold
Photoreceptors
Responds to light falling on receptor
Chemoreceptors
Responsive to chemical stimuli
Nociceptors
Sensitive to tissue trama, damage of tissue
Exteroceptors
Receptor that receives external stimuli
Interceptors
Receives stimulus from within body
Interceptors
Receives stimulus from within body
Proprinceptors
Responds to position and movement
Free nerve ending
Unspecified, afferent nerve ensig
Sensation
Of or related to a physical sensation/ feeling
Perception
To be able to see, hear, or become aware
Somatosensory system
Bodily perception, includes skin senses
Receptor potential
Graded potential in sensory system
Cranial nerves
12 pairs of nerves that are from the brain
Spinal nerves
31 nerves emerging from spinal cord
Ventral roots
Pass ventrally from the spinal cord
Dorsal roots
Pass dorsally to the spinal cord
Dorsal ramps
Posterior branches of the spinal nerves
Ventral ramus
Anterior divisions of the spinal nerves
Meninejeal branch
Artery vessels branching form pharyngeal artery
Nerve plexuses
A network of intersecting nerves
Cuteineous nerves
Nerve that intervates the skin
Cutaneous nerves
Nerve that intervates the skin
Autonomic nervous system
Responsible for control of bodily functions
Parasympathetic division
Actions that don’t require direct action
Sympathetic division
A Setor series of interconnected parts that act together in a common purpose the produce results