též //lamina tecti//, ploténka <span class="linked_term" onclick="showTermNamed('substantia grisea')">*šedé hmoty</span> na dorzální straně <span class="linked_term" onclick="showTermNamed('mesencephalon')">*mesencephala</span>. Obsahuje tři jaderná seskupení: //<span class="linked_term" onclick="showTermNamed('nucleus colliculi superioris')">*nuclei colliculi superiores</span>//, //<span class="linked_term" onclick="showTermNamed('nucleus colliculi inferioris')">*nuclei colliculi inferiores</span>// a&nbsp;//<span class="linked_term" onclick="showTermNamed('nucleus praetectalis')">*nucleus praetectalis</span>//. (Lenka Vargová)