undeployed while member 62 has been rotated one hundred eighty degrees in this configuration member 62 curves upward while remaining generally in the plane of the seat back should a passenger be extremely tall having member 82 curve upward could permit it to help support the passenger 39 s head notwithstanding the passenger 39 s unusual height fig5 illustrates member 62 in the same position as it appears in fig4 and member 58 in the same position as it appears in fig3 fig6 likewise depicts member 58 in its position of fig3 and 5 member 62 by contrast is shown in its undeployed position of fig1 2 the manipulation of collar 14 illustrated in fig6 may occur for example when a passenger desires merely to lean to his or her right and rest his or her face on a firmly positioned object detailed also in fig3 is base plate 22 u2032 to which collar 14 is connected as well as guides 90 rigidly connected to seat back 86 base plate 22 u2032 is functionally equivalent to base plate 22 albeit slightly different in appearance each of guides 90 is an elongated structure comprising base 94 at each end of base 94 is an.