) and the calcarine fissure (f.c.). The cross-section of the white matter is identical to section 4, only that it

is possible to identify the medial forceps layer (2.), the stratum sagittale internum (5.), and externum (6.) along the entire cross-section of the medial aspect of the occipital horn and between the horn and the calvar avis. These can all be seen with the naked eye. The cross-section of the occipital horn is squared with the dorsal surface being formed by the dorsal forceps, the medial surface by the calcarine fissure, and the inferior surface by the collateral sulcus. The dorsal forceps (1) is rather prominent, the ventral forceps rather weak (4), whilst the medial forceps layer (2) is relatively strong and equally thick as the lateral layer (3). The majority of fibres of the Olaparib manufacturer stratum sagittale

internum (5.) are collected lateral to the ventricle, whilst the fibres of the externum are collected ventral to it (6.). Selleckchem Lumacaftor However, fibres of the latter are still to be found in the lingual gyrus and to a smaller degree in the stem of the cuneus. It is possible to trace a veil from both layers across the medial surface of the occipital horn with the naked eye. 8. This photography shows a coronal section through the temporal lobe of a brain that suffered a stroke. As a consequence of the stroke the occipital cortex and a part of the temporal cortex, especially the first temporal Thalidomide gyrus, ipsilateral to the lesion are damaged. The level of this section is comparable to section 5. The brain stem was removed prior to hardening this specimen. A ramification of the removal is that the temporal lobe anatomy was altered and the cortex shifted more medial. The area of the cut showing the corona radiata of the temporal lobe is bend medially and almost reaches the hippocampus, which caused the unusual form of the lateral horn. The convexity of this section

shows the Sylvian fissure laterally and the sulcus hippocampi (h.) medially. Within the section the following structures are evident: the parallel sulcus (e.), the second and third temporal sulci (s.t. II. and III.), and the collateral sulcus (coll.), which indents the lateral horn from the inside towards the eminentia collateralis Meckelii. The majority of the first temporal gyrus and some of the second temporal gyrus are affected by the stroke. From the second temporal gyrus a bright layer of degenerated fibres runs towards the white mater ditch. From the occipital horn a small remnant of the tapetum is present (1.) lateral to it lies the well-maintained corona radiata of the temporal lobe (2.) whose propagation into the elongation stratum sagittale internum is cut off. The very prominent dark transvers cut through the stratum sagittale externum, as we know it from the healthy brain, is absent.