Thursday, August 9, 2012
Wednesday, August 1, 2012
OUR BRAIN IN SECTIONS:
OUR BRAIN IN SECTIONS:
By: Dulce M. Matamoros Columbie, PhD, PA.
Neurology Now; Retrieved 8/2/12.
Cerebral Cortex and its function: The outermost layer
of the cerebral hemisphere which is composed of gray matter. Cortices are
asymmetrical. Both hemispheres are able to analyze sensory data, perform memory
functions, learn new information, form thoughts and make decisions.
Left Hemisphere of the brain: Sequential Analysis:
systematic, logical interpretation of information. Interpretation and
production of symbolic information: language, mathematics, abstraction and
reasoning. Memory stored in a language format.
Right Hemisphere of the brain: Holistic Functioning:
processing multi-sensory input simultaneously to provide "holistic"
picture of one's environment. Visual spatial skills. Holistic functions such as
dancing and gymnastics are coordinated by the right hemisphere. Memory is
stored in auditory, visual and spatial modalities.
Corpus Callosum: Connects right and left hemisphere
to allow for communication between the hemispheres. Forms roof of the lateral
and third ventricles. Damage to the Corpus Callosum may result in "Split
Brain" syndrome.
Frontal Lobe: Cognition and memory.Prefrontal area:
The ability to concentrate and attend, elaboration of thought. The
"Gatekeeper"; (judgment, inhibition), personality and emotional
traits.
Movement: Motor Cortex (Brodman's): voluntary motor
activity.
Premotor Cortex: storage of motor patterns and voluntary
activities.
Language: motor speech
Impairment of recent memory, inattentiveness, inability to
concentrate, behavior disorders, difficulty in learning new information. Lack
of inhibition (inappropriate social and/or sexual behavior). Emotional
lability. "Flat" affect. Contralateral plegia, paresis, expressive/motor
aphasia.
Parietal Lobe: Processing of sensory input, sensory
discrimination, body orientation.Primary/ secondary somatic area.Inability to
discriminate between sensory stimuli. Inability to locate and recognize parts
of the body (Neglect).Severe Injury: Inability to recognize self, disorientation
of environment space, inability to write.
Occipital Lobe: Primary visual reception area. Primary
visual association area: Allows for visual interpretation. Primary Visual Cortex: loss of vision opposite
field. Visual Association Cortex: loss of ability to recognize object seen in
opposite field of vision, "flash of light", "stars".
Temporal Lobe: Auditory receptive area and
association areas. Expressed behavior, language: Receptive speech. Memory:
Information retrieval. Hearing deficits, agitation, irritability, childish
behavior, receptive/ sensory aphasia.
Limbic System: Olfactory pathways: Amygdala and their
different pathways. Hippocampi and their different pathways. Limbic lobes: Sex,
rage, fear; emotions. Integration of recent memory, biological rhythms. Hypothalamus.
Basal Ganglia: Subcortical gray matter nuclei.
Processing link between thalamus and motor cortex. Initiation and direction of
voluntary movement. Balance (inhibitory), Postural reflexes.Part of
extrapyramidal system: regulation of automatic movement.
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