Chapter 14: The Somatic Nervous System

What type of receptor cell is responsible for transducing pain stimuli?

nociceptor

Which of these cranial nerves is part of the gustatory system?

facial

Which submodality of taste is sensitive to the pH of saliva?

sour

Axons from which neuron in the retina make up the optic nerve?

retinal ganglion cells

What type of receptor cell is involved in the sensations of sound and balance?

mechanoreceptor

Which of these sensory modalities does not pass through the ventral posterior thalamus?

audition

Which nucleus in the medulla is connected to the inferior colliculus?

cochlear nucleus

Visual stimuli in the upper-left visual field will be processed in what region of the primary visual cortex?

inferior right

Which location on the body has the largest region of somatosensory cortex representing it, according to the sensory homunculus?

lips

Which of the following is a direct target of the vestibular ganglion?

cerebellum

Which region of the frontal lobe is responsible for initiating movement by directly connecting to cranial and spinal motor neurons?

primary motor cortex

Which extrapyramidal tract incorporates equilibrium sensations with motor commands to aid in posture and movement?

vestibulospinal tract

Which region of gray matter in the spinal cord contains motor neurons that innervate skeletal muscles?

ventral horn

What type of reflex can protect the foot when a painful stimulus is sensed?

withdrawal reflex

What is the name for the topographical representation of the sensory input to the somatosensory cortex?

homunculus