Navigation Links
New research puts a fresh spin on current thinking of speech evolution in humans

A study, published today in the prestigious journal Nature by Dr. Michael Petrides and colleagues at the Montreal Neurological Institute (MNI) at McGill University, challenges current thinking that speech developed as a result of new structures that evolved in the human brain. Dr. Petrides and colleagues have identified a distinct brain region that controls jaw movements in macaque monkeys that is comparable to Broca's area - the region in the human brain critical for speech production. This discovery is important as it suggests that this area of the brain evolved originally to perform high-order control over the mouth and the jaw, and that as humans evolved this area came to control the movements necessary for speech.

"Our study shows that nonlinguistic monkeys possess an area comparable to Broca's area ?it is located in the same region and has the same anatomical characteristics as Broca's area in the human brain", explained Dr. Michael Petrides, Coordinator of the Cognitive Neuroscience Unit at the MNI and Professor in the Department of Neurology and Neurosurgery, McGill University.

"The researchers performed quantitative microscopic analysis of the cytoarchitecture of the region of interest and electrophysiological stimulation and recording within this region.

When this area in the monkey was electrically stimulated, oral and facial motor responses were evoked ?such as jaw movement sequences, as well as respiratory responses. In addition, Broca's area is connected with a region of the brain immediately in front of it that is involved in the retrieval of information from memory.

"These connections suggest to us that Broca's area is in a unique position to use information shared from past experience and which is stored in memory for the service of communicative acts," explains Dr. Petrides. "That is, Broca's area may have evolved originally as an area exercising high-level control over oral and facial actions, including those related to communicative acts, and that, in the human brain, this area eventually came to control also certain aspects of the speech act."

The researchers hope that future studies of the anatomy and physiology of this region will yield major new insights as to why Broca's area became involved with speech in the human brain.


'"/>

Source:McGill University


Related biology news :

1. Columbia research lifts major hurdle to gene therapy for cancer
2. U of M researcher examines newly emerging deadly disease
3. NYU researchers simulate molecular biological clock
4. First atlas of key brain genes could speed research on cancer, neurological diseases
5. New research questions basic tenet of neuron function
6. Vital step in cellular migration described by UCSD medical researchers
7. ASU researchers finds novel chemistry at work to provide parrots vibrant red colors
8. UCSD researchers maintain stem cells without contaminated animal feeder layers
9. Why do insects stop breathing? To avoid damage from too much oxygen, say researchers
10. New protein discovered by Hebrew University researchers
11. First real-time view of developing neurons reveals surprises, say Stanford researchers
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/20/2017)... March 20, 2017 At this year,s CeBIT Chancellor ... biometrics manufacturer DERMALOG. The Chancellor came to the DERMALOG stand together with ... this year,s CeBIT partner country. At the largest German biometrics company the ... fingerprint, face and iris recognition as well as DERMALOGĀ“s multi-biometrics system.   ... ...
(Date:3/16/2017)... 16, 2017 CeBIT 2017 - Against identity fraud with DERMALOG solutions ... ... Used combined in one project, multi-biometric solutions provide a crucial contribution against ... Used combined in one project, ... ...
(Date:3/9/2017)... March 9, 2017 4Dx has publicly released ... Imaging Workshop at the University of Pennsylvania. Founder and ... deliver the latest data to world leaders in lung ... together leaders at the forefront of the industry to ... "The quality of the imaging is ...
Breaking Biology News(10 mins):
(Date:4/26/2017)... (PRWEB) , ... April 25, 2017 , ... LABS, Inc. ... were added to its extensive test menu: Nucleic Acid Testing (NAT) for ZIKV; ... LABS was only able to offer NAT screening for blood donors under an Investigational ...
(Date:4/26/2017)... ... April 26, 2017 , ... NextSteps ... and North America this May on the following dates: , ?    London, ... Taylor, Chairman of the Learning and Performance Institute will be the opening ...
(Date:4/26/2017)... April 26, 2017  Genisphere LLC, provider of ... signed a collaborative and sponsored research agreement with ... Muro . The overall goal of the partnership ... various 3DNA designs and formulations after in ... of the vasculature as well as inflammatory responses, ...
(Date:4/25/2017)... Oakland, California (PRWEB) , ... April 25, 2017 ... ... Artificial Intelligence (AI), leading supplier of Common Lisp (CL) development tools, and market ... 10.1 , which includes key performance enhancements now available within the most effective ...
Breaking Biology Technology: