Editing Facial Action Coding System (section)

==== Gross behavior codes ====
These codes are reserved for recording information about gross behaviors that may be relevant to the facial actions that are scored.
{| class="wikitable sortable"
|-
! AU number !! FACS name !! Muscular basis
|-
| 29 || Jaw thrust ||
|-
| 30 || Jaw sideways ||
|-
| 31 || Jaw clencher || ''[[masseter]]''
|-
| 32 || [Lip] bite ||
|-
| 33 || [Cheek] blow ||
|-
| 34 || [Cheek] puff ||
|-
| 35 || [Cheek] suck ||
|-
| 36 || [Tongue] bulge ||
|-
| 37 || Lip wipe ||
|-
| 38 || Nostril dilator  || ''[[Nasalis muscle|nasalis (pars alaris)]]''
|-
| 39 || Nostril compressor || ''nasalis'' (''pars transversa'') and ''[[Depressor septi nasi muscle|depressor septi nasi]]''
|-
| 40 || Sniff
|-
| 41 || Lid droop || ''[[levator palpebrae superioris]]'' (relaxation)
|-
| 42 || Slit || ''[[orbicularis oculi muscle]]''
|-
| 43 || Eyes closed || relaxation of ''levator palpebrae superioris''
|-
| 44 || Squint || ''[[corrugator supercilii]]'' and ''orbicularis oculi'' muscle
|-
| 45 || Blink || relaxation of ''levator palpebrae superioris''; contraction of ''orbicularis oculi'' (''pars palpebralis'')
|-
| 46 || Wink || ''orbicularis oculi''
|-
| 50 || Speech
|-
| 80 || Swallow
|-
| 81 || Chewing
|-
| 82 || Shoulder shrug
|-
| 84 || Head shake back and forth
|-
| 85 || Head nod up and down
|-
| 91 || Flash
|-
| 92 || Partial flash
|-
| 97* || Shiver/tremble
|-
| 98* || Fast up-down look
|}