ASSOCIATION FIBERS. 241 



thus associates the concepts of things seen with those of things 

 heard. Breaking of this connection produces intercortical sen- 

 sory aphasia. So, an object seen is recognized, but fails to sug- 

 gest its name; and the spoken word is heard and understood, but 

 does not recall the visual picture of the object or person it repre- 

 sents. According to Ferrier and Turner the inferior longitudinal 

 bundle is not found in the Macaque monkey, but is present in the 

 chimpanzee and the orang. 



(6) The Fasciculus Occipito-frontalis (Foreli). This is a 

 large bundle of fibers formerly regarded as a part of the corpus 

 callosum (Fig. 75). It is situated below the corpus callosum 

 and, in equitorial sections of the brain, is found in the angle formed 

 between the callosum and the internal capsule, just external to 

 the lateral ventricle. It extends from the cortex of every part of 

 the frontal lobe to the cortex of the convex surface and lateral 

 border of the occipital lobe. Posteriorly, the fibers diverge to 

 form a fan-like sheet in which there is an intermingling of fibers 

 from the corpus callosum (Cunningham); and that sheet enters 

 into the external boundary of the inferior horn of the lateral 

 ventricle and into the floor, lateral wall and roof of the posterior 

 horn, hence the synonym, tapetum. The tapetum is lined by the 

 ventricular ependyma and is separated from the inferior longit- 

 udinal bundle by the occipito-thalamic radiation. Its particular 

 function is unknown. 



(7) The Perpendicular Fasciculus (Fasciculus Perpendicularis, 

 Fig. 74). This is a very broad vertical bundle located just in 

 front of the occipital pole. It extends from the inferior parietal 

 and superior occipital gyri, above, down to the middle and inferior 

 temporal, the inferior occipital and the fusiform gyri. It is often 

 classed with the short association fibers. Its function is doubtful. 



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