Biology - Neural Control and Coordination Question with Solution | TestHub

The midbrain is located between the thalamus/hypothalamus of the forebrain and pons of the hindbrain.

The dorsal portion of the midbrain consists mainly of four round swellings (lobes) called corpora quadrigemina.

The ventral portion of the midbrain consists of two bundles of fibres called cerebral peduncles or crura cerebri.

The corpora quadrigemina is composed of two superior colliculi (involved in visual reflexes) and two inferior colliculi (involved in auditory reflexes).

Therefore, the statement that corpora quadrigemina are on the ventral surface of the midbrain is incorrect.

Answer: The corpora quadrigemina are four rounded elevations on the ventral surface of the mid brain.