Corona Radiata

The Corona Radiata consists of several pathways connecting the cortex to subcortical structures and the brainstem.  It is associate with many functions, namely cognition, decision-making, behavior regulation, motor movement and touch.



The Corticospinal Tract (CST) connects the cortex and spinal cord and is a subset of the Corona Radiata.  It is associated with motor movement and the sensation of touch.  Each tract controls the contralateral side of the body.


Corpus Callosum

The Corpus Callosum connects the left and right hemispheres of the cortex.  It is the major interhemispheric white matter tract and responsible for coordinating signals between the two hemispheres.



The Genu of the Corpus Callosum is the anterior-most subset.  It connect the prefrontal regions and is associated with decision-making, personality, and emotional regulation.


CC Body

The Corpus Callosum Body is the middle subset of the Corpus Callosum.  It primarily is associated with coordination of motor movements and touch sensation between the left and right sides of the human body.



The Splenium of the Corpus Callosum is the posterior-most subset.  It connect the occipital lobes and the temporal lobes via the tapetum.  It is associated with processing visual information.



The Cingulum is a major fiber pathway of the limbic system, which encircles and connects many of the midbrain structures to each other.  It is associated with learning, memory, behavior, sensation, and perception.


Arcuate Fasciculus

The Arcuate Fasciculus is a major association pathway connecting the frontal lobe with the temporal.  It is strongly associated with language functioning, particularly in the left hemisphere.


External Capsule

The External Capsule projects from the cortex to the basal ganglia in the center of the brain, in particular an area called the striatum.  The striatum is associated with inhibiting or regulating responses from the cortex, as well as learning and behavior.



The Fronto-Occipital Fasciculus (FOF) connects the frontal and occipital lobes in each hemisphere, passing through a narrow neck called the temporal stem.  It is associated with decision-making and cognitive processing of visual information.


Uncinate Fasciculus

The Uncinate Fasciculus connects the frontal lobe with the pole of the temporal lobe via the temporal stem.  Its functions are still relatively unknown, but has been postulated to be associated with episodic memory, language, and social-emotional processing.


Optic Radiations

The Optic Radiations directly project visual information from the Lateral Geniculate Nucleus (LGN) of the thalamus to the Primary Visual Cortex (V1) of the occipital lobe.  It is a key component of the visual pathway.