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  2. Jerome Lettvin - Wikipedia

    en.wikipedia.org/wiki/Jerome_Lettvin

    In the paper "What the Frog's Eye Tells the Frog's Brain", he took a major risk by proposing feature detectors in the retina. When he presented this paper at a conference, he was laughed off the stage by his peers, [ 10 ] yet for the next ten years it was the single most cited scientific paper.

  3. Brain - Wikipedia

    en.wikipedia.org/wiki/Brain

    Each part of the brain shows a mixture of rhythmic and nonrhythmic activity, which may vary according to behavioral state. In mammals, the cerebral cortex tends to show large slow delta waves during sleep, faster alpha waves when the animal is awake but inattentive, and chaotic-looking irregular activity when the animal is actively engaged in a ...

  4. Frog - Wikipedia

    en.wikipedia.org/wiki/Frog

    The use of the term frog in common names usually refers to species that are aquatic or semi-aquatic and have smooth, moist skins; the term toad generally refers to species that are terrestrial with dry, warty skins. [2] [3] There are numerous exceptions to this rule.

  5. List of animals by number of neurons - Wikipedia

    en.wikipedia.org/wiki/List_of_animals_by_number...

    The human brain contains 86 billion neurons, with 16 billion neurons in the cerebral cortex. [ 2 ] [ 1 ] Neuron counts constitute an important source of insight on the topic of neuroscience and intelligence : the question of how the evolution of a set of components and parameters (~10 11 neurons, ~10 14 synapses) of a complex system leads to ...

  6. Topographic map (neuroanatomy) - Wikipedia

    en.wikipedia.org/wiki/Topographic_map_(neuroanatomy)

    Unlike the topographic maps of the senses, the neurons of the motor cortex are efferent neurons that exit the brain instead of bringing information to the brain through afferent connections. The motor system is responsible for initiating voluntary or planned movements ( reflexes are mediated at the spinal cord level, so movements associated ...

  7. Tympanum (anatomy) - Wikipedia

    en.wikipedia.org/wiki/Tympanum_(anatomy)

    A frog's ear drum works in very much the same way as does a human eardrum. It is a membrane that is stretched across a ring of cartilage like a snare drum that vibrates. Crossing the middle ear chamber there is an ossicle called the columella that is connected to the tympanum, and another ossicle, the operculum, that connects this to the oval ...

  8. Olfactory bulb - Wikipedia

    en.wikipedia.org/wiki/Olfactory_bulb

    In most vertebrates, the olfactory bulb is the most rostral (forward) part of the brain, as seen in rats. In humans, however, the olfactory bulb is on the inferior (bottom) side of the brain. The olfactory bulb is supported and protected by the cribriform plate of the ethmoid bone , which in mammals separates it from the olfactory epithelium ...

  9. African clawed frog - Wikipedia

    en.wikipedia.org/wiki/African_clawed_frog

    The African clawed frog (Xenopus laevis), also known as simply xenopus, African clawed toad, African claw-toed frog or the platanna) is a species of African aquatic frog of the family Pipidae. Its name is derived from the short black claws on its feet. The word Xenopus means 'strange foot' and laevis means 'smooth'. The species is found ...

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