This “Normal” Hand Movement Is a Frontal Lobe Warning Sign This looks like a normal hand movement — but in adults, it’s abnormal. The Palmar Grasp (Prehension) Reflex should disappear by infancy. When it reappears in adults, especially on one side, it becomes a powerful localizing neurological sign. 📍 Points to the premotor cortex (Brodmann area 6) 🧠 Indicates loss of frontal inhibition A subtle bedside sign that speaks volumes. Follow Neurosurgery and Beyond for short, high-yield clinical neu