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What is the differences between commissures association fibers and projection fibers?
Association fibers connect different portions of cerebral hemisphere allowing cerebral cortex to function as a integrated whole whereas projection fibers connect cerebral hemispheres to other portions of brain n spinal cord
Are stria terminalis considered as projection fibers?
Projection fibers are usually considered as those fibers that connect the cerebral cortex to subcortical structures and vice versa. The stria terminalis connects the amygdala to the hypothalamus - i.e., two subcortical structures. So, on this basis they are not projection fibers. But because they connect subcortical structures they are referred to as 'association fibers'.
Which white matter tracts connect the cerebrum to the lower brain areas?
The internal capsule and the cerebral peduncles are white matter tracts that connect the cerebrum to lower brain areas such as the brainstem. These pathways are important for transmitting signals between different regions of the brain.
What is the white matter that lies beneath the cerebral cortex?
The white matter beneath the cerebral cortex is made up of myelinated nerve fibers that connect different regions of the brain. These fibers facilitate communication between different areas of the brain by transmitting electrical signals.
How is the cerebellum physically connected to the brainstem?
The brainstem sits between large organs -- the brain (including cerebrum and cerebellum) and spinal cord -- and is directly connected to them. The three segments of the brainstem (the midbrain, pons, and medulla) also give rise to most of the twelve cranial nerves (excluding cranial nerves I, II, and arguably XI).
What is the differences between commissures association fibers and projection fibers?
Association fibers connect different portions of cerebral hemisphere allowing cerebral cortex to function as a integrated whole whereas projection fibers connect cerebral hemispheres to other portions of brain n spinal cord
Are stria terminalis considered as projection fibers?
Projection fibers are usually considered as those fibers that connect the cerebral cortex to subcortical structures and vice versa. The stria terminalis connects the amygdala to the hypothalamus - i.e., two subcortical structures. So, on this basis they are not projection fibers. But because they connect subcortical structures they are referred to as 'association fibers'.
What is the difference between the two types of projection fibers?
Ascending fibres = from thalamus to cerebral cortexDescending fibres = from cerebral cortex to lower centres
Are unmyelinated cortical fibers found in the cerebral hemispheres?
Yes, unmyelinated cortical fibers can be found in the cerebral hemispheres. These fibers are a type of nerve cell projection that lack the protective myelin sheath, which is typically found in myelinated fibers. Unmyelinated fibers are involved in transmitting nerve impulses and can be found throughout the brain, including the cerebral hemispheres.
What is the internal capsule?
The internal capsule is the major structure carrying ascending and descending nerve projection fibers to and from the cerebral cortex
Is it true that Projection fibers in the brain mainly connect the right and left hemispheres?
Yes
Large fiber tract connecting the cerebal hemispheres?
Commissural fibers. These fibers connect the hemispheres of the brain including the cerebral portion.
Does Projection fibers in the brain mainly connect the right and left hemispheres?
No, They connect the white matter of the cerebrum with parts outside of it
Which white matter tracts connect the cerebrum to the lower brain areas?
The internal capsule and the cerebral peduncles are white matter tracts that connect the cerebrum to lower brain areas such as the brainstem. These pathways are important for transmitting signals between different regions of the brain.
The white matter of the cerebellum forms the?
The white matter of the cerebellum forms the arbor vitae, which refers to the branching pattern resembling a tree. It contains nerve fibers that connect different parts of the cerebellum and also connects the cerebellum to other parts of the brain.
What serves as a bridge between the brainstem and the cerebellum?
The Pons - The Pons includes a bridge of fibers that connects the brainstem with the cerebellum.
What are the ascending fibres of projection fibres?
They are fibres which radiate from thalamus and metathalamus to the cerebral cortex. They include:Anterior thalamic radiationsuperior thalamic (sensory) radiationposterior thalamic radiation, which consists of = optic + auditory radiations
