The Journal of Neurosurgery recently published a useful study addressing Traumatic Brain Injury exposure from the following five padding combinations:
1. unpadded (control),
2. MMA glove-unpadded head,
3. boxing glove unpadded head,
4. unpadded pendulum-boxing headgear,
5. boxing glove-boxing headgear.
The study went on to review a total of 17 injury risk parameters. Unsurprisingly, the study concluded the boxing glove-headgear combination provided the best overall reduction in impact dosage.
The study goes beyond this basic observation, however, and is the first study I am aware of which addresses the effectiveness of combat sport safety gear with respect to hook punches (as opposed to linear punches).