Ipsilateral vs. Contralateral - What's the difference?

Wikipedia

  • Ipsilateral

    Standard anatomical terms of location deal unambiguously with the anatomy of animals, including humans. All vertebrates (including humans) have the same basic body plan – they are strictly bilaterally symmetrical in early embryonic stages and largely bilaterally symmetrical in adulthood. That is, they have mirror-image left and right halves if divided down the centre. For these reasons, the basic directional terms can be considered to be those used in vertebrates. By extension, the same terms are used for many other (invertebrate) organisms as well. While these terms are standardized within specific fields of biology, there are unavoidable, sometimes dramatic, differences between some disciplines. For example, differences in terminology remain a problem that, to some extent, still separates the terminology of human anatomy from that used in the study of various other zoological categories.

  • Contralateral

    Standard anatomical terms of location deal unambiguously with the anatomy of animals, including humans. All vertebrates (including humans) have the same basic body plan – they are strictly bilaterally symmetrical in early embryonic stages and largely bilaterally symmetrical in adulthood. That is, they have mirror-image left and right halves if divided down the centre. For these reasons, the basic directional terms can be considered to be those used in vertebrates. By extension, the same terms are used for many other (invertebrate) organisms as well. While these terms are standardized within specific fields of biology, there are unavoidable, sometimes dramatic, differences between some disciplines. For example, differences in terminology remain a problem that, to some extent, still separates the terminology of human anatomy from that used in the study of various other zoological categories.

Wiktionary

  • Ipsilateral (adjective)

    On the same side of the body.

    "The stroke was characterised by ipsilateral paralysis."

  • Contralateral (adjective)

    On the opposite side of the body.

Oxford Dictionary

  • Ipsilateral (adjective)

    belonging to or occurring on the same side of the body.

  • Contralateral (adjective)

    relating to or denoting the side of the body opposite to that on which a particular structure or condition occurs

    "the symptom develops in the hand contralateral to the lesion"

Princeton's WordNet

  • Ipsilateral (adjective)

    on or relating to the same side (of the body)

  • Contralateral (adjective)

    on or relating to the opposite side (of the body)

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