Questions and Answers
What is the primary function of the primary sensory cortex?
Localize and identify sensory stimuli
Where are the frontal eye fields located in the brain?
Pre-motor cortex
Which region of the cerebral cortex is responsible for integrating multiple sensory modalities?
Association cortex
What is the function of the supplementary motor area?
Signup and view all the answers
What structure does the pre-motor cortex project primarily to?
Signup and view all the answers
Which area of the cerebral cortex processes information specific to a single primary area?
Signup and view all the answers
In what part of the brain are the legs represented in the somatotopic organization?
Signup and view all the answers
Which region of the cerebral cortex is known as a 'push button' for triggering muscle movement?
Signup and view all the answers
What is a key feature of the somatosensory cortex?
Signup and view all the answers
Which area of the cerebral cortex is responsible for processing information from multiple sensory modalities?
Signup and view all the answers
What is the primary function of the pre-motor cortex?
Signup and view all the answers
Which area is responsible for coordinating bilateral movements?
Signup and view all the answers
A lesion in the pre-motor cortex is likely to cause which of the following deficits?
Signup and view all the answers
Which area is primarily responsible for the mental rehearsal of complex movement sequences?
Signup and view all the answers
What is the term for the inability to recognize objects through touch, caused by a lesion in the somatosensory association cortex?
Signup and view all the answers
Which area is responsible for processing and integrating basic somatosensory information into meaningful perceptions?
Signup and view all the answers
Which of the following is NOT a function of the supplementary motor area?
Signup and view all the answers
What is the term for the inability to perform skilled, coordinated movements, which can result from a lesion in the supplementary motor area?
Signup and view all the answers
Which area is responsible for executing basic muscle contractions?
Signup and view all the answers
Which of the following statements about the pre-motor cortex is NOT true?
Signup and view all the answers
What is the key difference between the 'ready' phase and the 'go' phase in movement preparation?
Signup and view all the answers
How do lesions to the premotor cortex affect movement initiation?
Signup and view all the answers
What is one of the primary functions of the supplementary motor area?
Signup and view all the answers
Which statement best describes the role of the somatosensory association cortex?
Signup and view all the answers
How does agnosia relate to the somatosensory association cortex?
Signup and view all the answers
What happens in stereoagnosia, a condition related to the somatosensory association cortex?
Signup and view all the answers
What is the primary function of the multimodal (or heteromodal) association cortex?
Signup and view all the answers
What is a key feature of the motor association cortex?
Signup and view all the answers
What distinguishes the pre-motor cortex from the primary motor cortex?
Signup and view all the answers
Which area of the cerebral cortex is responsible for processing information specific to a single primary cortex?
Signup and view all the answers
What is the main role of the supplementary motor area?
Signup and view all the answers
Where are the frontal eye fields typically located within the brain?
Signup and view all the answers
What type of information does the unimodal association cortex process?
Signup and view all the answers
What is a distinguishing feature of the pre-motor cortex?
Signup and view all the answers
What is a significant function of the primary sensory cortex?
Signup and view all the answers
Where is the somatosensory association cortex typically located?
Signup and view all the answers
Study Notes
Primary Sensory Cortex
- Localizes and identifies sensory stimuli
- Processes raw data from senses (e.g., touch, where sensation is coming from)
Primary Motor Cortex
- Triggers and executes movement commands
- Contains upper pyramidal neurons (UPN) that send signals to lower pyramidal neurons (LPN) to trigger and modulate execution
- Acts as a "push button" for the spinal cord to trigger muscle contractions
Association Cortex
Unimodal Association Cortex
- Processes information specific to a single primary cortex
- Allows for higher-level processing of a single activity
- Adjacent to somatosensory cortex
Multimodal (or Heteromodal) Association Cortex
- Integrates multiple sensory modalities (e.g., large portions of temporal, frontal, and inferior parietal lobe)
- Pulls information from multiple unimodal areas to give more meaning
Motor Association Cortex
Pre-Motor Cortex
- Functions prior to movement onset
- Set-related and directionally specific
- Coordinating activity of multiple joints within the same limb (arm/leg)
- Stimulation causes muscle contractions at multiple joints
- Affects contralateral limbs
- Lesions cause inability to initiate movement or coordinate multi-joint movements
Supplementary Motor Area
- Coordinates bilateral movement
- Programs complex sequences of movement (e.g., playing piano)
- Affects contralateral limbs
- Direct influence on proximal muscles (shoulder/hip region)
- Influence on distal muscles via primary motor cortex
- Inter-hemispheric connections for bilateral coordination
- Lesions cause deficits in bimanual coordination and inability to perform complex acts
Somatosensory Association Cortex
- Responsible for high-level processing
- Takes basic associations and forms a deeper, complex meaning
- Lesions can cause stereoagnosia (inability to recognize objects by touch) or agraphesthesia (inability to recognize writing on the skin)
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
