Question

muscles moves the condyle and articular disc anterior and downwards on glenoid fossa

Answer 1

Hy
The muscle which move the condyle anterior and downward on glenoid fossa to open the mouth is lateral pterygoid. Mind you that it is the only muscle attached to Temporomandibular joint.
Reference- Anatomy of head and neck, BD Chaurasia, Volume 3.
Hope it helps
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Dr Chinmay