From the Guidelines
The left cortical functions include language processing, logical reasoning, analytical thinking, mathematical calculations, sequential processing, and verbal memory, with specific areas responsible for speech production, language comprehension, reading, writing, and numerical operations. The left hemisphere of the brain is specialized for these functions due to hemispheric lateralization during brain development 1. Some of the key left cortical functions are:
- Language processing: The left hemisphere houses Broca's area, responsible for speech production, and Wernicke's area, which handles language comprehension 1.
- Logical reasoning and analytical thinking: The left hemisphere is involved in mathematical calculations, sequential processing, and verbal memory 1.
- Motor control: The left hemisphere controls movement on the right side of the body due to the crossing of motor pathways in the brain 1.
- Executive functions: The left frontal lobe manages executive functions like planning and organization 1.
- Memory: The left temporal lobe processes verbal memory and auditory information, and the left parietal lobe handles reading, writing, and numerical operations 1. It is essential to note that damage to the left cortex can result in language disorders like aphasia, highlighting its critical role in communication and cognitive processing 1.
From the Research
Left Cortical Functions
Some left cortical functions include:
- Language processing, such as speech production and comprehension 2
- Control of the right side of the body
- Logical reasoning and problem-solving
- Mathematical calculations and spatial awareness
Language Processing
Language processing is a key function of the left cortex, and damage to this area can result in:
- Aphasia, a condition characterized by difficulty speaking or understanding language 2
- Difficulty with speech production, including finding the right words or forming sentences
- Trouble with reading and writing
Other Functions
The left cortex is also involved in:
- Motor control, including fine motor skills such as writing or playing a musical instrument
- Sensory processing, including touch and proprioception (awareness of body position)
- Emotional regulation, including the processing of emotions such as happiness, sadness, and fear
Note: The provided studies do not directly discuss left cortical functions, but rather focus on the effects of donepezil on cognitive function and recovery after brain injury. However, study 2 mentions the improvement of speech production deficits in patients with chronic conduction aphasia and extensive left hemisphere infarctions, which suggests that language processing is a left cortical function.