BRAIN STEM AND CRANIAL NERVES

Front

Which of the following functions is most directly associated with the medulla oblongata?

1. Regulation of sleep-wake cycles

, Coordination of voluntary movement, Generation of rhythmic breathing patterns, Interpretation of visual stimuli

Back

Generation of rhythmic breathing patterns

Front

A patient with a lesion in the lateral medulla is least likely to exhibit which of the following symptoms? Hoarseness and difficulty swallowing, Loss of pain and temperature sensation on the contralateral body, Ipsilateral Horner’s syndrome, Complete facial paralysis on the contralateral side

Back

Complete facial paralysis on the contralateral side

Front

A lesion in the ventral pons affecting descending motor pathways and cranial nerve nuclei would most likely result in:

Back

Contralateral hemiparesis and ipsilateral facial weakness

Front

The apneustic and pneumotaxic centers located in the pons primarily influence:

Back

Fine-tuning of breathing pattern and depth

Front

A midbrain lesion affecting the oculomotor nerve (CN III) may result in all of the following EXCEPT: Diplopia when looking medially, Ptosis, Dilated pupil unresponsive to light, Upward gaze palsy

Back

Diplopia when looking medially

Front

Which of the following midbrain structures is most involved in visual and auditory reflexes, such as turning your head toward a sudden sound?
Options: Red nucleus, Superior colliculus, Substantia nigra, Periaqueductal gray

Back

Superior colliculus

Front

Which of the following would most likely occur with a lesion affecting the medullary respiratory centers?

1. Hyperactive deep breathing during rest

, Slow, irregular breathing or respiratory arrest, Increased oxygen demand in tissue, Rapid shallow breathing controlled by the cortex

Back

Slow, irregular breathing or respiratory arrest