Chapter 16.5, Problem 32LO

Summary Introduction

To summarize: The nerve pathways involved in equilibrium.

Concept introduction: The awareness and monitoring of the head position refer to equilibrium. The brain receives the sensory inputs sent by the sensory receptors. The sensory input from vestibular apparatus, visual sensory input, and the proprioceptor sensory input integrates with each other to balance the equilibrium. During static equilibrium, the utricle and saccule detect the stationary position of the head. For example, when one person is standing straight, the utricle and saccule inform the brain that the head is at an upright position. The utricle and saccule detect the linear acceleration of the head. In contrast, the semicircular ducts are responsible for detection of angular acceleration of the head.