Fox squirrel (Sciurus niger): The fox squirrel is the largest tree squirrel in Illinois, weighing one and three-quarters to two pounds with a length of 19 Â½ to 22 inches. The fur is a mix of rusty-yellow with black with an overall reddish cast. The fur on the ears, belly, and edge of the tail is lighter.
Audiologists are able to measure the speed and intensity of these pulses to determine if there is hearing loss or a lesion that is upsetting the flow of the sound information through the brainstem. This measurement is called a brainstem auditory evoked response (BAER).
Sleep and waking patterns are controlled in the forebrain. The forebrain controls many functions, including smelling. The largest part of the brain, the forebrain processes cognitive, auditory, visual and sensory information. Located in the forebrain, the hippocampus and amygdala are parts of the limbic system.he two main sections of the forebrain, however, are the telencephalon and the diencephalon. The telecephalon includes the cerebral cortex, the subcortical structures, and the corpus callosum, while the diencephalon includes the thalamus and the hypothalamus.