A 19-year-old trauma patient is brought to the ER with a sev…
A 19-year-old trauma patient is brought to the ER with a severe traumatic brain injury. Upon applying a painful stimulus, you observe the patient’s upper extremities undergo flexion (arms pulled toward the chest) while the lower extremities undergo extension. According to the motor control hierarchy, this decorticate posturing typically indicates a lesion at which level?
Read DetailsA 62-year-old male is being evaluated for a suspected cortic…
A 62-year-old male is being evaluated for a suspected cortical lesion. During the neurological exam, you notice he has significant difficulty performing a task that requires coordinated use of both hands to manipulate an object, despite normal muscle strength and sensation. Based on the hierarchical control of movement, which statement best describes the role of the Premotor Area (PMA) in this patient’s motor function?
Read DetailsDuring a physical exam, you shine a light into the right eye…
During a physical exam, you shine a light into the right eye. You observe that neither the right nor the left pupil constricts. However, when you shine the light into the left eye, both pupils constrict normally. This finding is most consistent with a lesion of the:
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