What do Otolith organs detect?

The otolith organs, which are part of the vestibular system in the inner ear, play a crucial role in detecting linear accelerations and the position of the head in relation to gravity. They consist of two structures known as the utricle and saccule, which contain tiny crystals that move in response to gravity and any changes in speed without a change in direction. This function allows us to sense whether we are moving faster or slower along a straight path, providing important information about our body's motion and orientation.

While the other options mention different sensory modalities or movements, they do not accurately reflect the primary function of the otolith organs. For example, angular movements are primarily detected by the semicircular canals, which respond to rotational motion rather than linear speed changes. Similarly, visual distortions and sound variations are related to entirely different sensory systems – the visual system and auditory system, respectively. Thus, the correct answer underscores the specific role of otolith organs in detecting linear acceleration without directional changes.