etruscan shrew brain

The Etruscan shrew has a body length of about 4 centimetres (1.6 in) excluding the tail. The presence of distinct cortical areas is suggested by the fact that different staining methods (Nissl, cytochrome oxidase activity, myelin) indicate the …

The Etruscan shrew, Suncus etruscus, is one of the smallest mammals. As in other mammals, the cortex of the Etruscan shrew is a cytoarchitectonically heterogeneous sheet of tissue. Work on related shrew species has demonstrated that these Its cerebral cortex is very thin, only 400 to 500 µm on average [16,70]. attacks (Anjum et al. Because of its small size, quantitative analysis of the Etruscan shrew cortex is more tractable than in other animals. Large parts of the shrew's brain respond to vibrissal touch, which is represented in at least four cortical areas comprising collectively about a third of the cortical volume. The Etruscan shrew has the smallest brain of all mammals. Etruscan shrews can enter a torpid state and reduce their body temperature; we observed that cortical response latencies become two to three times longer when body temperature drops from 36°C to 24°C, suggesting that … Etruscan shrews can recognize prey shape with amazing speed and accuracy, based on whisker-mediated tactile cues. To quantitatively assess the anatomy of the Etruscan shrew's brain, we sectioned brains … (The bumblebee bat is regarded as the smallest mammal by skull size and body length. ) The Etruscan shrew (Suncus etruscus), also known as the Etruscan pygmy shrew or the white-toothed pygmy shrew, is the smallest known mammal by mass, weighing only about 1.8 grams (0.063 oz) on average. The neurobiology of Etruscan shrews is of interest both because of their small size and their remarkable behavioral capacities. The small brain size of only 400 m thickness—is ideal for two-photon-microscopy based approaches to brain function. 2006).

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