NURSING 101 Chapter 18: Disorders of the Central and Peripheral Nervous Systems and the Neuromuscular Junction

. Diffuse axonal injuries (DAIs) of the brain often result in: a. Reduced levels of consciousness c. Fine motor tremors b. Mild but permanent dysfunction d. Visual disturbances ANS: A Focal brain injuries account for more than two-thirds of head injury deaths; DAIs accounts for less than one third. However, more severely disabled survivors, including those in an unresponsive state or reduced level of consciousness, have DAIs. The other options do not appropriately complete the stem. PTS: 1 REF: Page 582 2. What event is most likely to occur to the brain in a classic cerebral concussion? a. Brief period of vital sign instability b. Cerebral edema throughout the cerebral cortex c. Cerebral edema throughout the diencephalon d. Disruption of axons extending from the diencephalon and brainstem ANS: A Transient cessation of respiration can occur with brief periods of bradycardia, and a decrease in blood pressure occurs, lasting 30 seconds or less. Vital signs stabilize within a few seconds to within normal limits. The other options do not accurately describe an event associated with a classic cerebral concussion. PTS: 1 REF: Page 588