I am board certified neuroradiologist and have examined hundreds of gunshot wounds to the head and neck, mainly by CT scans. Cranial MRIs are generally not done in acute GSW to the head because of acuity and artifact generated by metal. Embedded metal in a brain would move precipitously in 1.5 T magnetic field.
The trajectory of the bullet was downward and slightly obklique from TA right to left. The bullet penetrated the right frontal bone, just above right brow, entered the anterior cranial fossa, and probably grazed or penetrated some the anterior right frontal lobe white matter. The bullet then exited out of the anterior cranial fossa somewhere to the left of midline ie planum sphenoidale or left orbital roof then entered TA left infratemporal fossa.
There is also possibility that the fragment did not proceed in a straight direct A to B course. Course depends on muzzle velocity, kinetic energy of a 25 caliber projectile, bullet fragment spin and disintegration, bullet fragment interaction between the inner and outer table of skull. There may also have been some ricochet phenomenon operative although Horns report was not clear here.
The bullet fragment lodged near the left mandibular condyle. I am unclear if the left side of the upper nasopharynx near the torus tubarius was injured or not. There is insufficient detail in Horns report to identify with precision exactly where bullet exited out of the anterior cranial fossa.
Kinetic energy and fragment spin would traumatize TA right frontal lobe. But TA would still be very much conscious and still be completely mobile. The bullet fragment trajectory was far away from the right motor strip or the right internal capsule.
