Neuro 3: Brain Stem and Sensory Systems

A list of flashcards covering key concepts related to the brain stem, cranial nerves, and sensory systems.

What are the subdivisions of the brain stem?

Midbrain, Pons, Medulla Oblongata.

What defines the border between the medulla oblongata and the spinal cord?

Pyramidal decussation.

Name two prominent surface landmarks of the medulla oblongata.

Pyramid, Olivary eminence.

Which cranial nerves are associated with the medulla oblongata?

Glossopharyngeal CN IX, Vagus CN X, Hypoglossal CN XII.

What cranial nerves are associated with the pons?

Trigeminal CN V, Abducens CN VI, Facial CN VII, Vestibulocochlear CN VIII.

Name surface landmarks associated with the midbrain.

Crus cerebri, Substantia nigra.

Which cranial nerves are associated with the midbrain?

Oculomotor CN III, Trochlear CN IV.

What part of the ventricular system is associated with the midbrain?

Cerebral aqueduct.

Where is the primary sensory neuron for somatic sensation?

Peripheral process in the skin.

Where does the primary sensory neuron for visceral sensation synapse?

In the spinal cord.

What is the route of axons for somatic sensory neurons?

Dorsal column, medulla, medial lemniscus.

Where is the second neuron in the somatic sensory chain?

Brain Stem for the dorsal column/medial lemniscus system.

Where does the second neuron in the visceral sensory chain synapse?

In the spinal cord.

Where does the second neuron for somatic sensation cross the midline?

In the Brain Stem.

Where is the third neuron in the sensory chain for somatic sensations?

Thalamus in the diencephalon.

Where does the sensory information project in the cerebral cortex?

Sensory Cortex.