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  2. Frog galvanoscope - Wikipedia

    en.wikipedia.org/wiki/Frog_galvanoscope

    The frog's legs twitched as the discharge happened. [6] Galvani found that he could make the prepared leg of a frog (see the Construction section) twitch by connecting a metal circuit from a nerve to a muscle, thus inventing the first frog galvanoscope. [7] Galvani published these results in 1791 in De viribus electricitatis. [8]

  3. Frog - Wikipedia

    en.wikipedia.org/wiki/Frog

    Warty frog species tend to be called toads, but the distinction between frogs and toads is informal, not from taxonomy or evolutionary history. An adult frog has a stout body, protruding eyes, anteriorly-attached tongue, limbs folded underneath, and no tail (the tail of tailed frogs is an extension of the male cloaca

  4. Outline of the human nervous system - Wikipedia

    en.wikipedia.org/wiki/Outline_of_the_human...

    The following diagram is provided as an overview of and topical guide to the human nervous system: Human nervous system. Human nervous system – the part of the human body that coordinates a person's voluntary and involuntary actions and transmits signals between different parts of the body. The human nervous system consists of two main parts ...

  5. Nerve net - Wikipedia

    en.wikipedia.org/wiki/Nerve_net

    Nettle jelly. A nerve net consists of interconnected neurons lacking a brain or any form of cephalization.While organisms with bilateral body symmetry are normally associated with a condensation of neurons or, in more advanced forms, a central nervous system, organisms with radial symmetry are associated with nerve nets, and are found in members of the Ctenophora, Cnidaria, and Echinodermata ...

  6. Vagusstoff - Wikipedia

    en.wikipedia.org/wiki/Vagusstoff

    Diagram of the frog heart preparation used by Loewi. Vagus nerve stimulation slows heart rate while accelerator (sympathetic) nerve stimulation speeds up heart rate. Vagusstoff (literally translated from German as "Vagus Substance") refers to the substance released by stimulation of the vagus nerve which causes a reduction in the heart rate.

  7. Feature detection (nervous system) - Wikipedia

    en.wikipedia.org/wiki/Feature_detection_(nervous...

    Feature detection is a process by which the nervous system sorts or filters complex natural stimuli in order to extract behaviorally relevant cues that have a high probability of being associated with important objects or organisms in their environment, as opposed to irrelevant background or noise.

  8. Neuroanatomy - Wikipedia

    en.wikipedia.org/wiki/Neuroanatomy

    The vertebrate nervous system is divided into the central and peripheral nervous systems. The central nervous system (CNS) consists of the brain , retina , and spinal cord , while the peripheral nervous system (PNS) is made up of all the nerves and ganglia (packets of peripheral neurons) outside of the CNS that connect it to the rest of the body.

  9. Development of the nervous system - Wikipedia

    en.wikipedia.org/wiki/Development_of_the_nervous...

    The vertebrate central nervous system (CNS) is derived from the ectoderm—the outermost germ layer of the embryo. A part of the dorsal ectoderm becomes specified to neural ectoderm – neuroectoderm that forms the neural plate along the dorsal side of the embryo.