ExRx.net : Spine Articulations

Cervical

Flexion

Bending the joint resulting in a decrease of angle; moving the spine Forward; the neck (T1-S1) moves toward the chest.

Extension / Hyperextension

Straightening the joint resulting in an increase of angle; moving the spine back; the neck (T1-S1) moves away from the chest.

Lateral Flexion (Abduction)

Lateral movement away from the midline of the body; moving the spine to the side (left or right); the neck (T1-S1) moves toward the shoulder.

Reduction (Adduction)

Return to the anatomical position from lateral movement; straightening the neck (T1-S1) from lateral flexion.

Rotation

Rotary movement around the longitudinal axis of the bone; turning the spine to the side (right or left); the neck (T1-S1) turns toward the shoulder.

Flexion

Bending the joint resulting in a decrease of angle; moving the spine forward; the thorax moves toward the pelvis.

Extension / Hyperextension

Straightening the joint resulting in an increase of angle; moving the spine back; the thorax moves away from the pelvis.

Lateral Flexion (Abduction)

Lateral movement away from the midline of the body; moving the spine to the side (left or right); the thorax moves to the side toward the pelvis.

Reduction (Adduction)

Return to the anatomical position from lateral movement; straightening the spine from lateral flexion.

Rotation

Rotary movement around the longitudinal axis of the bone; turning the spine to the side (right or left); the thorax rotates to one side.

Also see https://exrx.glorb.com/Articulations/Neck. Mentioned articulations occur during concentric phase of exercise video examples.