The Sleep Motif in Macbeth (Ayman, Halil and Mustafa)

“Now o’er the one half-world Nature seems dead, and wicked dreams abuseThe curtain’d sleep” Macbeth says this to himself in Act 2 Scene 1 on lines 49-52.
“A heavy summons lies like lead upon me, And yet I would not sleep: merciful powers, Restrain in me the cursed thoughts that natureGives way to in repose!” Banquo to his son in Act 2 Scene 1 on lines 6-9.
“Shake off this downy sleep, death’s counterfeit, / And look on death itself!” In Act 2 Scene 3 on lines 76-77.
Methought I heard a voice cry “Sleep no more!Macbeth does murder sleep,” the innocent sleep,Sleep that knits up the ravell’d sleave of care,The death of each day’s life, sore labour’s bath,Balm of hurt minds, great nature’s second course,Chief nourisher in life’s feast. Macbeth to Lady Macbeth in Act 2 Scene 2 on lines 32-37.
“rise from her bed, throw her night-gown upon her, unlock her closet, take forth paper, fold it, write upon’t, read it, afterwards seal it, and again return to bed; yet all this while in a most fast sleep” Act 5 Scene 1 lines 5-7 while Lady Macbeth is sleepwalking.
“A great perturbation in nature, to receive at once the benefit of sleep, and do the effects of watching!” Act 5 Scene 1 lines 8-10. Doctors comment.