What form of locomotion is used by gorillas that involves locking their wrists and elbows?

Gorillas primarily use knuckle-walking as their mode of locomotion, which uniquely involves the locking of their wrists and elbows. This form of movement allows them to travel effectively on all fours while supporting their considerable weight. During knuckle-walking, gorillas utilize their knuckles to bear weight while keeping their limbs stable, which aids in maintaining balance and reducing strain on their joints.

This adaptation is particularly beneficial for a large, heavy animal as it allows for both efficient movement across the ground and the ability to navigate the complex environments in which they live, such as forested areas. It differentiates them from other forms of locomotion like bipedal walking, where individuals stand and walk on two legs, and vertical climbing, which involves ascending trees without the support of their knuckles. Thus, knuckle-walking is distinct and specifically tailored to the gorilla's anatomy and ecological needs.