It's the mind

1920

 1

  The Cabinet of Dr. Caligari

1960

 2

  Psycho

1965

 3

  Repulsion

1975

 4

  One Flew Over the Cuckoo's Nest

1984

 5

  Birdy

1988

 6

  Dead Ringers

1988

 7

  Vampire's Kiss

1991

 8

  The Fisher King

1991

 9

  Naked Lunch

1991

 10

  What About Bob?

1993

 11

  Clean, Shaven

1995

 12

  Copycat

1999

 13

  Fight Club

1999

 14

  Girl, Interrupted

2000

 15

  Memento

2001

 16

  A Beautiful Mind

2002

 17

  Spider

2004

 18

  The Machinist

2006

 19

  I'm a Cyborg, But That's OK

2009

 20

  The Soloist

2011

 21

  We Need to Talk About Kevin

2013

 22

  Blue Jasmine

2014

 23

  Still Alice

2015

 24

  Mr. Holmes

2016

 25

  They Look Like People

2019

 26

  Joker