Architectonic organization of the inferior parietal convexity of the macaque monkey.

The inferior parietal lobule (IPL) of the macaque monkey constitutes the largest part of Brodmann's area 7. Functional, connectional, and architectonic data have indicated that area 7 is comprised of several distinct sectors located in the lateral bank of the intraparietal sulcus and on the IPL cortical convexity. To date, however, attempts to parcellate the IPL based on architectonic criteria have been controversial, and correlation between anatomical and functional data has been inadequate.

Cortical connections of the inferior parietal cortical convexity of the macaque monkey.

We traced the cortical connections of the 4 cytoarchitectonic fields--Opt, PG, PFG, PF--forming the cortical convexity of the macaque inferior parietal lobule (IPL). Each of these fields displayed markedly distinct sets of connections. Although Opt and PG are both targets of dorsal visual stream and temporal visual areas, PG is also target of somatosensory and auditory areas.

Occipital (V6) and parietal (V6A) areas in the anterior wall of the parieto-occipital sulcus of the macaque: a cytoarchitectonic study.

The anterior wall of the parieto-occipital sulcus (POs) of the macaque monkey, classically considered as part of Brodmann's area 19, contains two functionally distinct areas: a ventral, purely visual area, V6, and a dorsal area, V6A, containing visual neurons and neurons related to the control of arm movements. The aim of this study was to establish whether areas V6 and V6A, so far identified only on a functional basis, have a cytoarchitectonic counterpart. The cytoarchitectonic analysis of 13 hemispheres from ten macaque brains, cut along different planes of section, showed that the anterior wall of the POs contains three distinct areas.

Neurochemical characterization of the cerebellar-recipient motor thalamic territory in the macaque monkey.

Abstract The immunoarchitectonics of the macaque motor thalamus was analysed to look for a possible neurochemical characterization of thalamic territories, which were not definable cytoarchitectonically, associated with different functional pathways. Thalamic sections from 15 macaque monkeys were processed for visualization of calbindin (CB), parvalbumin (PV), calretinin (CR) and SMI-32 immunoreactivity (ir). PV-, CR- and SMI-32ir distributions did not show any clear correlation with known functional subdivisions.

Two different streams form the dorsal visual system: anatomy and functions.

There are two radically different views on the functional role of the dorsal visual stream. One considers it as a system involved in space perception. The other is of a system that codes visual information for action organization.

Prefrontal and agranular cingulate projections to the dorsal premotor areas F2 and F7 in the macaque monkey.

The superior sector of Brodmann area 6 (dorsal premotor cortex, PMd) of the macaque monkey consists of a rostral and a caudal architectonic area referred to as F7 and F2, respectively. The aim of this study was to define the origin of prefrontal and agranular cingulate afferents to F7 and F2, in the light of functional and hodological evidence showing that these areas do not appear to be functionally homogeneous. Different sectors of F7 and F2 were injected with neural tracers in seven monkeys and the retrograde labelling was qualitatively and quantitatively analysed.

Characterization and Regional Distribution of a Class of Synapses with Highly Concentrated cAMP Binding Sites in the Rat Brain.

A class of putative synaptic terminals with concentrated cAMP binding sites are labelled in unfixed sections of rat brain by means of the ligand 8-thioacetamido fluorescein cAMP (SAF-cAMP), a fluorescent analogue of cAMP. The labelled terminals appear as sharply delimited bouton-like structures in close proximity but external to the cell body of neurons. The SAF-cAMP binding, measured at equilibrium in competition with other nucleotides, indicates that the binding site recognizes the cAMP moiety of SAF-cAMP.