afferent fibres - from visual pathway

- to the reticular formation and further via tractus rubrospinalis to centrum ciliospinale /Budge/ at the level of C8-Th1 spinal segments, then via truncus sympathicus and ganglion cervicale superius as the sympathetic pathway for m. dilatator pupillae (mydriasis)

1. Colliculus superior - from superficial layers to visual pathway

- from deep layers to tractus tectospinalis (synkinesis of eyes and head in relation of visual impulses)

1. Colliculus inferior - to auditory pathway

1. Nucleus ruber

afferent fibres - from brain cortex and cerebellum

efferent fibres - tractus rubrospinalis = flexors activation

                               - tractus rubrothalamicus - engagement in the cortical motor activity

2. Substantia nigra - pars compacta - it creates dopamine and enables the striatum activity

                                 - pars reticularis - the "relative" of basal ganglia conveys the striatum influence on the motor activity of brain stem (RF)

3. Substantia grisea centralis - nucleus interstitialis /Cajal/ and nucleus commissurae posterioris /Darkshevich/ are linked in fasciculus longitudinalis medialis

1. Tractus pyramidalis - fibrae corticospinales (down to alfa-motoneurs in the anterior horn of grey columns in the medulla spinalis)

                                                  - fibrae corticonucleares (to nuclei of cranial nerves)

   2.   Tractus corticopontinus - fibrae fronto-, occipito-, parieto-, temporopontinae (they pass from brain cortex to nuclei pontis, where they are interpolated in fibres continuing in the tractus pontocerebellares)