b'\n_START_ARTICLE_\n\xc4\x8cetrkalne\n_START_PARAGRAPH_\n\xc4\x8cetrkalne (lat\xc4\xab\xc5\x86u: tectum mesencephali) ir vidussmadze\xc5\x86u da\xc4\xbca, kurai ir \xc4\x8detru pauguru forma. Divi aug\xc5\xa1\xc4\x93jie pauguri (colliculi superiores) ir zemgarozas redzes analizatoru centri, apak\xc5\xa1\xc4\x93jie (colliculi inferiores) \xe2\x80\x94 dzirdes analizatoru centri. Padzi\xc4\xbcin\xc4\x81jum\xc4\x81 starp aug\xc5\xa1\xc4\x93jiem un apak\xc5\xa1\xc4\x93jiem pauguriem atrodas epif\xc4\xabze. \xc4\x8cetru pauguru pl\xc4\x81ksn\xc4\xabti (lamina quadrigemina) d\xc4\x93v\xc4\x93 ar\xc4\xab par vidussmadze\xc5\x86u jumtu.'