Final answer:
The conventional grip activates the opposition movement of the thumb and uses the intrinsic muscles of the hand to manipulate objects, with the phalanx bones of the fingers and thumb essential to this process.
Step-by-step explanation:
The conventional grip in anatomical terms involves the opposition movement of the thumb toward the fingers of the same hand, which facilitates grasping and holding objects.
The grip action is made possible by the intrinsic muscles of the hand, which both originate and insert within the hand itself.
These muscles are responsible for the fine motor control of the fingers via actions such as flexing, extending, abducting, and adducting the distal finger and thumb segments Intrinsic Muscles of the Hand.
The phalanx bones within the fingers and the thumb, specifically the three phalanges in each finger and two in the thumb, play crucial roles in our ability to make a fist or grip objects tightly. This process is further detailed in Figure 8.10 Hand During Gripping, where the importance of the fourth and fifth metatarsal bones is highlighted during firm gripping.