Table 2.

Search criteria, keywords and sample search strategy

Subject	Keywords	MeSH Terms
Auditory	music therapy, music, Bach, Mozart, lullaby, singing, maternal AND (heartbeat OR voice OR speech OR sound), auditory stimulation, adult talk, parent talk	Music Therapy; Singing; Acoustic Stimulation; Voice; Speech
Gustatory/Olfactory	colostrum, oral immune therapy, sucrose, flavor, gustatory, taste, oral hygiene, oral care, buccal care, smell, scent, olfactory, odor	Colostrum; Sucrose; Taste Perception; Taste; Flavoring Agents; Oral Hygiene; Smell; Olfactory Perception; Odors
Kinesthetic	kinesthetic, range of motion, physical therapy, exercise, physical activity, physiotherapy, passive limb movement, extension AND flexion	Kinesthesis; Range of Motion; Articular; Musculoskeletal Manipulations; Motor Activity; Physical Therapy Modalities; Movement; Exercise
Tactile	tactile stimulation, touch, tactile, massage, skin contact, skin-to-skin, kangaroo care, kangaroo mother care, acupressure	Touch; Tactile stimulation; M technique; TAC TIC; Massage
Vestibular	rock, bounce, swing, hammock, vestibular	Vestibule; Labyrinth; Motion; Proprioception
Vision	Eye contact, eye engagement, visual contact, visual engagement, eye-to-eye, mobile, light AND (cycled OR exposure OR dim OR reduction), visual AND (stimulus OR toy OR intervention OR novelty OR pattern)	Photic Stimulation; Pattern Recognition; Visual; Color Perception; Lighting; Light
Multimodala	multimodal, multiple sensory, ATVV
combined with
Infant	infant, newborn, neonate, preterm, premature, low birth weight, LBW, VLBW, ELBW	Infant; Infant, Premature; Infant, Low Birth Weight
Sample search strategy
Population		1 Infant[mh] OR infanta[tiab] OR newborna[tiab] OR neonata[tiab]
		2 preterma[tiab] OR pre-terma[tiab] OR prematura[tiab] OR ‘low birthweight’[tiab] OR ‘low birth weight’[tiab] OR lbw[tiab] OR vlbw[tiab]
		3 1 AND 2
		4 Infant, Premature[mh]
		5 Infant, Low Birth Weight[mh]
		6 #3 OR #4 OR #5
Interventions		7 Music therapy[mh] OR musica[tiab] OR Bach[tiab] OR Mozart[tiab] OR lullaba[tiab] OR Singing[mh] OR singing[tiab]
		8 Mothers[mh] OR mothera[tiab] OR maternal[tiab]
		9 Voice[mh] OR voice[tiab]
		10 Speech[mh] OR speech[tiab]
		11 ‘sound simulation’[tiab]
		12 #9 OR #10 OR #11
		13 #8 AND #12
		14 Acoustic Stimulation[mh]
		15 ‘auditory stimulation’[tiab]
		16 heartbeata[tiab] OR ‘heart beat’[tiab]
		17 ‘adult talk’[tiab] OR ‘parent talk’[tiab]
		18 #7 OR #13 OR #14 OR #15 OR #16 OR #17
Combined		19 #6 AND #18

^aSearches of individual sensory categories also generated multimodal studies for inclusion.