"primitive reflex" meaning in English

{
  "forms": [
    {
      "form": "primitive reflexes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "primitive reflex (plural primitive reflexes)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Physiology",
          "orig": "en:Physiology",
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            "Biology",
            "Medicine",
            "Sciences",
            "Healthcare",
            "All topics",
            "Health",
            "Fundamental",
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          "source": "w"
        }
      ],
      "glosses": [
        "A reflex action originating in the central nervous system that is exhibited by normal infants, but not neurologically intact adults, in response to particular stimuli."
      ],
      "id": "en-primitive_reflex-en-noun-a~C602As",
      "links": [
        [
          "physiology",
          "physiology"
        ]
      ],
      "raw_glosses": [
        "(physiology) A reflex action originating in the central nervous system that is exhibited by normal infants, but not neurologically intact adults, in response to particular stimuli."
      ],
      "topics": [
        "medicine",
        "physiology",
        "sciences"
      ]
    }
  ],
  "word": "primitive reflex"
}

{
  "forms": [
    {
      "form": "primitive reflexes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "primitive reflex (plural primitive reflexes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
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        "en:Physiology"
      ],
      "glosses": [
        "A reflex action originating in the central nervous system that is exhibited by normal infants, but not neurologically intact adults, in response to particular stimuli."
      ],
      "links": [
        [
          "physiology",
          "physiology"
        ]
      ],
      "raw_glosses": [
        "(physiology) A reflex action originating in the central nervous system that is exhibited by normal infants, but not neurologically intact adults, in response to particular stimuli."
      ],
      "topics": [
        "medicine",
        "physiology",
        "sciences"
      ]
    }
  ],
  "word": "primitive reflex"
}