NAME_________________ BIOLOGY 2402 DATE_________________ BRAIN AND CRANIAL NERVES QUIZ FALL 2011 A 1. The group of nuclei involved in controlling muscle tone and subconscious motor activities such as swinging your arms while walking are the limbic system/basal nuclei. The group of nuclei involved in emotion are the limbic system/basal nuclei. 2. Match the cranial nerve with the appropriate function. (20 pts) a. vagus nerve b. olfactory nerve c. abducens nerve d. trochlear nerve e. accessory nerve f. oculomotor nerve g. optic nerve h. facial nerve i. glossopharyngeal nerve k. trigeminal nerve l. hypoglossal nerve m. vestibulocochlear nerve _____ This nerve carries the majority of the parasympathetic outflow. _____ This nerve carries the sensations for taste from the anterior two-thirds of the tongue. _____ This nerve carries the sensations for vision. _____ This nerve innervates the trapezius muscle. _____ This nerve carries impulses from the carotid sinus and sensations for taste from the posterior one third of the tongue. _____ This nerve carries motor impulses for tongue movement. _____ This nerve carries the sensations for smell. _____ This nerve carries the sensations from the inner ear for balance and equilibrium. _____ This was the nerve conducting the impulses from the cornea when you touched with the cotton ball. _____ This was the nerve carrying the motor impulses during the corneal reflex. _____ List one of the nerves conducting sensory impulses during the salivary reflex. _____ This nerve carried impulses to the eye to bring about constriction of the pupil. _____ This nerve carries motor impulses for eye movement. (pick one) _____ This nerve innervates the masseter. 3. Match the lobe of the cerebrum with the correct function. (10 pts) a. insula b. temporal c. frontal d. occipital e. parietal _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ This lobe contains Broca’s area. Vision becomes conscious here. Smell becomes conscious here. This lobe controls motor activities. Touch becomes conscious here. Sound becomes conscious here. This lobe received impulses during the pupillary light reflex. This lobe has the premotor area. This lobe contains the postcentral gyrus. This lobe is involved in memory and emotion. 4. Match the below areas of the brain with the appropriate functions. (20 pts) a. association fibers b. substantia nigra c. pons d. reticular formation e. cerebellum f. basal nuclei g. parietal lobe h. insula i. medulla j. superior colliculi k. inferior colliculi l. thalamus m. hypothalamus n. occipital lobe o. corpus callosum p. projection fibers q. limbic system r. commissural fibers _____ This area houses the pneumotaxic and apneustic area involved in regulating respiration. _____ This area of the brain is a relay station to the cerebral cortex for all sensory input except smell. _____ This area of the brain contains the cardiac center, vasomotor center, and the respiratory center. _____ This group of nuclei control muscle tone, consciousness and acts as a brain filter (habituation). _____ This area of the brain monitors proprioceptors, compares that with cerebral cortex commands for movement, and sends corrective impulses to the cerebral cortex. _____ This area of the brain contains the satiety center, the thirst center and the center for regulation of body temperature. _____ These nuclei are affected by Parkinson’s disease. _____ This area of the brain is involved in controlling auditory reflexes such as turning the head toward someone speaking to you. _____ This is the largest area of commissural fibers in the brain. _____ These fibers connect gyri from the same cerebral hemisphere. _____ These fibers form the ascending and descending tracts. 5. Diagram the blood-cerebrospinal fluid barrier or the blood-brain barrier. List a function of the barrier you diagram. 6. Explain how the hypothalamus regulates endocrine activity. 7. What is a circumventricular organ? Give an example of a CVO and its function. 8. The precentral/postcentral gyrus is involved in motor commands. The precentral/postcentral gyrus is where sensory information from general sensation receptors becomes conscious Bonus. Why did hyperventilation give the fastest frequency when measuring EEG’s in lab?