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ускорение "голова – ноги" stresses
avia.	heart moves toward head acceleration; negative acceleration
avia., med.	caudad acceleration; footward acceleration
ускорение "голова-ноги"
gen.	caudad acceleration
avia.	negative G
avia., med.	downward acceleration; eyeball-up acceleration; head-to-foot acceleration

ускорение " голова -ноги: 30 phrases in 5 subjects

Astronautics	5
Aviation	14
Aviation medicine	5
Makarov	2
Medical	4