Midterms - Consciousness And Sleep Flashcards
(20 cards)
The consciousness system is an (ascending,descending) system
Ascending
The pathways of the consciousness system arise from the
Basal forebrain, hypothalamus and brainstem
The pathways of the consciousness system modulate activity of the cerebral cortex through projections to the
Thalamus or directly to the cerebral cortex
This is defined as the state of awareness of self and environment
Consciousness
Consciousness system is determined by two main functions namely
Arousal and awareness
Level of consiousness
Arousal
Content or consciousness/experiece
Awareness
Location of the consciousness system
Brainstem, Cerebral hemisphere, Diecephalon
Structures in the consciousness sytem includes the following except:
A. Nuclei of the brainstem reticular formation, hypothalamus and basal forebrain
B. Thalamic nuclei
C. Descending projections from the brainstem, hypothalamus and basal forebrain from the thalamus and cerebral cortex
D. Areas of the cerebral cortex
E. AOTA
C (ascending projections to the thalamus and cerebral cortex)
This systems is primarily responsible for the arousal component of consciousness?
Ascending projections of the reticular activating system and basal forebrain on the thalamus and cerebral cortex
A normal cyclic physiologic alteration of consciousness
Sleep
Sleep is controlled by which areas of the brain?
Hypothalamus, Thalamus and Brainstem reticular formation
(Arousal, Attention) is required for the normal processing of information for conscious awareness
Attention
A lesion responsible for a disorder of consciousness can be located at which level?
Supratentorial and Posterior Fossa Level
A complex aggregate of neurons whose cell bodies form clusters in the tegmental portion of the brainstem, the basal forebrain, and the thalamus
Reticular formation
Which feature is characteristic of neurons in the reticular formation?
A. Short axons with no collaterals
B. Radiating dendrites with many branches
C. Long, radiating dendrites with few branches
D. Cell bodies located only in the spinal cord
C
The reticular formation is primarily located in which part of the brain?
Brainstem tegmentum, Basal forebrain and thalamus
Functional subdivisions of the reticular formation includes the following except:
A. Midline region
B. Lateral Region
C. Medial Region
D. Anterior Region
D
This subdivision of the reticular formation contains large neurons that project to the spinal cord and ocular motor nuclei
Medial region
This subdivision of the reticular formation receives axon collaterals from many ascending pathways
Lateral region
