Dendritic morphology of pyramidal neurons in the chimpanzee neocortex: regional specializations and comparison to humans.
نویسندگان
چکیده
The primate cerebral cortex is characterized by regional variation in the structure of pyramidal neurons, with more complex dendritic arbors and greater spine density observed in prefrontal compared with sensory and motor cortices. Although there are several investigations in humans and other primates, virtually nothing is known about regional variation in the morphology of pyramidal neurons in the cerebral cortex of great apes, humans' closest living relatives. The current study uses the rapid Golgi stain to quantify the dendritic structure of layer III pyramidal neurons in 4 areas of the chimpanzee cerebral cortex: Primary somatosensory (area 3b), primary motor (area 4), prestriate visual (area 18), and prefrontal (area 10) cortex. Consistent with previous studies in humans and macaque monkeys, pyramidal neurons in the prefrontal cortex of chimpanzees exhibit greater dendritic complexity than those in other cortical regions, suggesting that prefrontal cortical evolution in primates is characterized by increased potential for integrative connectivity. Compared with chimpanzees, the pyramidal neurons of humans had significantly longer and more branched dendritic arbors in all cortical regions.
منابع مشابه
Synaptogenesis and development of pyramidal neuron dendritic morphology in the chimpanzee neocortex resembles humans.
Neocortical development in humans is characterized by an extended period of synaptic proliferation that peaks in mid-childhood, with subsequent pruning through early adulthood, as well as relatively delayed maturation of neuronal arborization in the prefrontal cortex compared with sensorimotor areas. In macaque monkeys, cortical synaptogenesis peaks during early infancy and developmental change...
متن کاملEffect of Boswellia serrata Triana & Planch. gum resin administration during lactation on morphology of pyramidal neurons in hippocampus of rat
Background & Aim: In traditional medicine, Boswellia species gum resin known as Frankincense or Olibanum, has been administrated in elderly for enhancement of memory and also in pregnant women to increase memory and intelligence of progeny. However, it has been rarely scientifically documented so far. We have previously reported that maternal administration of Frankincense during lacta...
متن کاملEffect of Boswellia serrata Triana & Planch. gum resin administration during lactation on morphology of pyramidal neurons in hippocampus of rat
Background & Aim: In traditional medicine, Boswellia species gum resin known as Frankincense or Olibanum, has been administrated in elderly for enhancement of memory and also in pregnant women to increase memory and intelligence of progeny. However, it has been rarely scientifically documented so far. We have previously reported that maternal administration of Frankincense during lacta...
متن کاملA Stereological Study on Hippocampal Subfields Following Administration of Methamphetamine in Male Mice
Background and Aims: This study examined sub-chronic effects of Methamphetamine (METH) on the stereological parameters in the Cornu Ammonis (CA) of the hippocampus in adult mice. Materials and Methods: Fifteen adult male mice, eight weeks old, were randomly divided into three groups: receive saline (controls), or low-dose (LD) 2.5 mg/kg METH, or high-dose (HD) 25 mg/kg METH, via daily intrap...
متن کاملPhosphorylation of Neurogenin2 Specifies the Migration Properties and the Dendritic Morphology of Pyramidal Neurons in the Neocortex
The molecular mechanisms specifying the dendritic morphology of different neuronal subtypes are poorly understood. Here we demonstrate that the bHLH transcription factor Neurogenin2 (Ngn2) is both necessary and sufficient for specifying the dendritic morphology of pyramidal neurons in vivo by specifying the polarity of its leading process during the initiation of radial migration. The ability o...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Cerebral cortex
دوره 23 10 شماره
صفحات -
تاریخ انتشار 2013