Sense of gravity is detected by
Utricle and saccule are stimulated by displacement of the otolithic membrane during the head tilts.They are concerned with acceleration and deceleration. (Ref: Diseases of EAR, NOSE and THROAT by PL Dhingra; 6th edition; page no.18)
Horizontal semicircular canal
Lateral semicircular canal
Superior semicircular canal
Utricle and saccule
Ear