Review: 'Inside Out 2' takes us back inside the mind of a girl, this time dealing — through humor and heart — with the anxiety and other emotions of being a teenager.

It’s been nine years since Pixar released “Inside Out,” one of the studio’s most intelligent and heartwarming titles — and it’s an achievement that the sequel, “Inside Out 2,” manages to come even close to the original’s wit and insight into the mind of a girl.

The first movie was set inside the mind of Riley, a generally happy adolescent girl from Minnesota who has to deal with the culture shock of her family’s move to San Francisco. The five major emotions in Riley’s mind — Joy, Sadness, Fear, Anger and Disgust — navigate these changes, explore the different aspects of Riley’s imagination and dreamscape, and share the realization that memories can be more than one emotion at a time.

Fans of the first movie that in the final reel, a new button was installed on the console in Riley’s brain — an alarm for something called “puberty.” In the new movie, that alarm goes off.

Riley has turned 13, and is still generally happy — a condition guarded over by Joy (voiced by Amy Poehler), who is sort of in charge in the headquarters of Riley’s mind. But when work crews come through HQ making adjustments, something seems to be off with the controls, because Riley is overemotional, no matter which of the quintet is at the helm. (The other voices here are Lewis Black and Phyllis Smith returning as Anger and Sadness, and new cast members Tony Hale as Fear and Liza Lapira as Disgust.)

The five are surprised to learn that there are more emotions moving in: Anxiety (voiced by Maya Hawke), Envy (voiced by Ayo Edibiri), Embarrassment (voiced by Pruitt Taylor Vince) and Ennui (voiced by Adele Exarchopoulos). And they’re ready to take over operating Riley’s emotional reactions just as she’s heading to a three-day hockey training camp that she thinks will decide her high-school future.

I don’t want to say much more about what happens after that — in part because Disney asked critics not to, but mainly because director Kelsey Mann (a veteran Pixar story artist) and writers Dave Holstein and Meg LeFauve create some clever takes on the many changes happening in this teen girl’s mind. And those ideas are visualized with humor and sublime animation.

The most fascinating part of “Inside Out 2” is the observation that Riley’s mind is too complex to be easily categorized, and that having one emotion — whether it’s anxiety or even joy — dominate over the others isn’t healthy in the long run. That may be a heady message to convey to the kids that Disney is targeting, but it’s one that their parents might find handy to remember later.

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‘Inside Out 2’

★★★1/2

Opens Friday, June 14, in theaters everywhere. Rated PG for some thematic elements. Running time: 96 minutes.