Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Language Development01:22

Language Development

Children master language quickly and with relative ease, supported by both biological predisposition and reinforcement. B. F. Skinner (1957) proposed that language is learned through reinforcement, while Noam Chomsky (1965) argued that language acquisition mechanisms are biologically determined.
The critical period for language acquisition suggests that the ability to acquire language is at its peak early in life. As people age, this proficiency decreases. Language development begins very...
Psychosexual Stages of Personality: Oral01:16

Psychosexual Stages of Personality: Oral

The oral stage is the initial phase of Sigmund Freud's theory of psychosexual development, occurring from birth to approximately 12 to 18 months. During this period, the infant's mouth serves as the primary source of pleasure, with actions such as sucking, chewing, biting, and drinking playing a crucial role in reducing tension. These activities are essential not only for nourishment but also for the infant's psychological and emotional satisfaction.
Weaning, typically occurring around the age...
Deglutition01:25

Deglutition

Swallowing, otherwise known as deglutition, facilitates the transport of food from the mouth to the stomach. It is a multifaceted process that involves both the tongue and the muscles of the throat and esophagus. Saliva and mucus aid in this process, which takes approximately 4 to 8 seconds for semi-solid or solid food and around 1 second for liquids or very soft food.
Swallowing can be divided into three stages: the voluntary phase, the pharyngeal phase, and the esophageal phase. Although the...
Tongue01:01

Tongue

The human tongue is a fascinating and complex organ, responsible for various essential functions such as swallowing, speech, and taste. It is also subject to various conditions and diseases. In this article, we delve into the anatomy of the tongue, its roles, and some common conditions that can affect it.
Anatomical Position in the Oral Cavity
The tongue is located within the oral cavity, also known as the mouth. It is attached to the floor of the mouth by a fold of mucous membrane called the...
The Tongue and Taste Buds00:49

The Tongue and Taste Buds

The surface of the tongue is covered with various small bumps called papillae, which either distribute what has been ingested (filiform papillae) or contain the sensory taste (or gustatory) receptor cells (fungiform, circumvallate, and foliate papillae). Embedded within each taste-related papilla are the taste buds—clusters of 30 to 100 gustatory receptor cells.
Assessment of the Mouth01:26

Assessment of the Mouth

A thorough mouth assessment, including inspection and palpation of the lips, gums, tongue, tonsils, uvula, and pharynx, is crucial in detecting potential health issues. Diseases ranging from oral cancer to systemic conditions like diabetes could be identified early through careful oral examination. This article provides a detailed guide on conducting a comprehensive mouth assessment.
Mouth Inspection
The inspection begins with visually examining the mouth for symmetry, color, and size.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

The integrative biology of marmoset monkey vocal learning.

Philosophical transactions of the Royal Society of London. Series B, Biological sciences·2026
Same author

Groove to the music.

Science (New York, N.Y.)·2025
Same author

Altricial brains and the evolution of infant vocal learning.

Proceedings of the National Academy of Sciences of the United States of America·2025
Same author

Wild Encounters: Analyzing Human-Animal Interactions in British and Irish Association of Zoos and Aquariums Facilities.

Zoo biology·2025
Same author

Stability of Individual Differences in Social and Nonsocial Visual Attention From Newborn to 14 Months.

Developmental psychobiology·2025
Same author

Altricial brains and the evolution of infant vocal learning.

bioRxiv : the preprint server for biology·2024
Same journal

Effects of Children's Video Gaming Experience on Chinese Orthographic Processing and Its Neural Mechanisms.

Developmental science·2026
Same journal

The Kia TÄ«mata Pai Randomized Controlled Trial: ENRICH Early Childhood Teacher Training Improves Toddlers' Oral Language and Self-Regulation.

Developmental science·2026
Same journal

Deaf Children's Use of Mutual Exclusivity and Eye Gaze to Determine Word Meanings in American Sign Language.

Developmental science·2026
Same journal

Adolescents and Adults Use Different Facial Movements and Vocal Cues to Express Emotions.

Developmental science·2026
Same journal

Decoding Preschool Social Dynamics: Automated Tracking of Spatial and Temporal Patterns to Investigate Social Interactions and Relationships in Peer Groups.

Developmental science·2026
Same journal

Early Life Stress Affects Human Decision Making by Increasing Expectations of Volatility.

Developmental science·2026
See all related articles

Related Experiment Video

Updated: May 21, 2026

A Protocol for Comprehensive Assessment of Bulbar Dysfunction in Amyotrophic Lateral Sclerosis (ALS)
12:43

A Protocol for Comprehensive Assessment of Bulbar Dysfunction in Amyotrophic Lateral Sclerosis (ALS)

Published on: February 21, 2011

Monkey lipsmacking develops like the human speech rhythm.

Ryan J Morrill1, Annika Paukner, Pier F Ferrari

  • 1Neuroscience Institute, Princeton University, Princeton, NJ 08540,USA.

Developmental Science
|June 20, 2012
PubMed
Summary
This summary is machine-generated.

The rhythm of human speech may have evolved from primate facial expressions. Monkey lipsmacks show similar developmental patterns to human speech, suggesting a shared evolutionary origin.

More Related Videos

Non-Nutritive Suck Parameters Measurements Using a Custom Pressure Transducer System
06:19

Non-Nutritive Suck Parameters Measurements Using a Custom Pressure Transducer System

Published on: April 19, 2024

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models
08:32

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models

Published on: March 1, 2015

Related Experiment Videos

Last Updated: May 21, 2026

A Protocol for Comprehensive Assessment of Bulbar Dysfunction in Amyotrophic Lateral Sclerosis (ALS)
12:43

A Protocol for Comprehensive Assessment of Bulbar Dysfunction in Amyotrophic Lateral Sclerosis (ALS)

Published on: February 21, 2011

Non-Nutritive Suck Parameters Measurements Using a Custom Pressure Transducer System
06:19

Non-Nutritive Suck Parameters Measurements Using a Custom Pressure Transducer System

Published on: April 19, 2024

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models
08:32

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models

Published on: March 1, 2015

Area of Science:

  • Evolutionary biology
  • Neuroscience
  • Primatology

Background:

  • Human speech has a consistent, critical rhythmic structure.
  • The evolutionary origin of speech rhythm is debated, with theories including de novo evolution or modification of existing rhythmic behaviors.

Purpose of the Study:

  • To investigate the hypothesis that speech rhythm evolved from rhythmic facial expressions.
  • To examine the structure and developmental trajectory of macaque monkey lipsmacks.

Main Methods:

  • Analyzed the developmental patterns of macaque monkey lipsmacks.
  • Compared the development of lipsmacking to chewing movements in monkeys.
  • Compared primate developmental patterns to human speech and chewing development.

Main Results:

  • Younger monkeys exhibited slower, more variable mouth movements, which became faster and less variable with age.
  • This developmental pattern was specific to lipsmacking and not observed in chewing.
  • Both monkey lipsmacking and human speech converge on a ~5 Hz rhythm.

Conclusions:

  • Monkey lipsmacking and human speech share a homologous developmental mechanism.
  • These findings support the theory that human speech rhythm evolved from primate facial expressions.