6. Brain Flashcards
Connects the spinal cord to the remainder of the brain
Brainstem
The most inferior portion of the brainstem
Contains ascending and descending nerve tracts which convey signals to other regions of the brain
Medulla oblongata
Extend the length of the medulla oblongata
Consist of descending nerve tracts which transmit action potentials from the brain
Pyramids
Superior to the medulla oblongata
Contains ascending and descending nerve tracts
Pons
Superior to the pons
Smallest region of the brainstem
Midbrain
Dorsal part of the midbrain consists of four mounds called the______
Colliculi
Midbrain contains a black nuclear mass called ______
Substantia nigra
Group of nuclei collectively called the _______
Reticular formation- plays important regulatory functions
Plays an important role in arousing and maintaining consciousness and in regulating sleep-wake cycle
Reticular activating system
Removal of visual or auditory stimuli may lead to ?
Drowsiness or sleep
Damage to the cells of the reticular formation can cause ?
Coma
Attached to the brainstem by several large connection called cerebellar peduncles
Cerebellum
These connections provide routes of communication
Cerebellar peduncles
Part of the brain between the brainstem and cerebrum
Main components: thalamus, hypothalamus and epithalamus
Diencephalon
Largest part of the diencephalon
Thalamus
Small area superior and posterior to thalamus
Consists of few nuclei, involved in the response to odors
Epithalamus
Endocrine gland that may influence the onset of puberty
Pineal gland
Most inferior part of the diencephalon
Contains several nuclei that are important in maintaining homeostasis
Center role in control of body temp. Hunger, thirst
Hypothalamus
Funnel shapes stalk
Extends from the floor of hypothalamus to pituitary gland
Infundibulum
Involved in the emotional response to odors and memory
Mammilary bodies
Largest part of the brain
Cerebrum
It is divided into left and right hemispheres by a ?
Longitudinal fissure
Important in the control of voluntary motor functions, motivation, aggression, mood etc
Frontal lobe
Principal center for receiving and consciously perceiving most sensory information such as touch, pain, temp., and balance
Parietal lobe
Functions in receiving and perceiving visual input
Occipital lobe
Involved in olfactory (smell) and auditory (hearing)sensations
Important role in memory
Temporal lobe
Associated with functions such as abstract though and judgement
Psychic cortex
