The projection tracts(projection fibers ) was severed. Because it is one of the the links between the cerebrum and the midbrain.
Commissural tracts and Association tracts are other type of bundle of axon in the brain.
The bundle of axon fibers (white matter tact) that connects the cerebrum wit other parts of the Central Nervous System is called the projection tracts.
Anatomically, these tracts project vertically between the higher brain ( the medulla oblongata, pons and the midbrain) and lower brain centers(brain stem, spinal cord and the cerebellum) to serve as the conduit for information transfer between the cerebrum and other parts of the CNS. Examples are: Corticospinal tracts, Corticobulbar, medial Lemniscus and more
Therefore if there is loss of communication between the cerebrum and the midbrain ,the tract is damaged.
It can not be either of Commissural tracts and Association tracts because the former enables the connection between the two cerebral hemispheres, and the later connect the memory center of the brain with the perceptual.
Therefore the answer is projection tracts
More on this at https://brainly.com/question/25734605
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