( ( Adjunct ( and ( Conjunct ( Rotation ( Adjunct rotation ) ) ) ) ) ( ( is ( ( the term ) ( used ( to ( ( describe ( the ( ( ( voluntary or ) active ) ( rotation movements ) ) ) ) ( that ( you ( perform ( to ( rotate ( ( a bone ) ( about ( its ( longitudinal axis ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Adjunct) (CC and) (NNP Conjunct) (NNP Rotation) (NNP Adjunct) (NNP rotation)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (VP (VBN used) (S (VP (TO to) (VP (VB describe) (NP (DT the) (ADJP (JJ voluntary) (CC or) (JJ active)) (NN rotation) (NNS movements)) (SBAR (IN that) (S (NP (PRP you)) (VP (VBP perform) (S (VP (TO to) (VP (VB rotate) (NP (NP (DT a) (NN bone)) (PP (IN about) (NP (PRP$ its) (JJ longitudinal) (NNS axis)))))))))))))))) (. .)))
Adjunct and Conjunct Rotation Adjunct rotation is the term used to describe the  voluntary or active rotation movements that you perform to rotate a bone about its longitudinal axis.
(ROOT (S (NP (JJ Medial) (NN rotation)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (NN rotation)) (PP (IN of) (NP (NP (DT a) (NN bone)) (PP (IN toward) (NP (NP (DT the) (NN midline)) (PP (IN of) (NP (DT the) (NN body))))))))))) (. .)))