What are the three main features used to describe the folded surface of the brain?
1.Gyrus (gyri): Folded ridges on the brain surface.
2.Sulcus (sulci): Shallow grooves on the brain surface.
3.Fissure (fissures): Deep grooves, such as the Longitudinal fissure that separates the right and left cerebral hemispheres.
What structure connects the two cerebral hemispheres, allowing information to pass between them?
The Corpus Callosum, which consists of axons that carry information from one side to the other.
Describe the concept of hemispheric lateralization.
The right cerebral cortex is associated with and controls the left side of the body, and the left cerebral cortex is associated with and controls the right side of the body.
What is the primary function of the Frontal Lobe?
Control of motor and executive functions.
Which area issues motor commands to skeletal muscles, and where is it located?
The Primary Motor Cortex (Area 4), located directly anterior to the central sulcus.
What is the role of the Prefrontal Cortex?
It is responsible for “executive functions,” where options are evaluated, and outcomes/consequences are predicted.
What is Broca’s Area and its function?
It is the Speech Center (Areas 44, 45) located in the frontal lobe (associated with the temporal lobe), which coordinates the muscle contractions necessary for converting sounds into speech.
What is the primary function of the Parietal Lobe?
Receipt and interpretation of general sensory information (somatic).
Which area receives general body sensations (touch, pain, temperature), and where is it located?
The Primary Sensory Cortex (Areas 1, 2, 3), located directly posterior to the central sulcus.
What is the function of the Somatic Sensory Association Area?
It monitors and recognizes the types of sensations (e.g., recognizing a specific object by touch or a mosquito bite).
: What is the primary function of the Occipital Lobe?
Receiving and interpreting visual information.
What is the role of the Primary Visual Cortex?
It receives visual information from the retina (filtered through the thalamus).
What does the Visual Association Area do?
It interprets visual patterns for meaning (e.g., recognizing letters or symbols).
What is the primary function of the Temporal Lobe?
Receiving and interpreting auditory information.
What are the functions of the Primary Auditory Cortex
Primary Auditory Cortex: Monitors the environment for sound.
What are the functions of the Auditory Association Area
Auditory Association Area: Recognizes sounds and assigns them meaning (e.g., recognizing words).
Where is the General Interpretive Area (GIA) located, and what is its role?
It is located where the parietal, temporal, and occipital lobes join (usually in the left cortex). It integrates all senses, memories, and responses, playing a large role in personality.
What is the function of the Cingulate Gyrus?
It is on the medial surface of the cortex and links emotion with learning and memory.
What are the functions of the Hypothalamus?
It is the “master gland” that links the nervous system and endocrine functions. It regulates hunger, thirst, libido, rage, fear, and daily circadian rhythms.
What is the function of the Thalamus?
It is the main sensory filter region of the brain, receiving sensory signals and deciding what information will be transmitted to the cerebral cortex.
What is the primary function of the Basal Nuclei?
They work with the frontal lobe motor regions to coordinate learned skeletal motor patterns (e.g., driving a car, playing an instrument).
What is the overall function of the Limbic System?
It links the conscious cerebral cortex with the unconscious autonomic nervous system, establishing experience, evaluating emotions, and facilitating memory.
What are the functions of the Hippocampus ?
Hippocampus: Storage and retrieval of long-term memories.
What are the functions of the Amygdala?
Amygdala: Links emotions with memories and generates the fight or flight response.
