Biopsych Lectures 1-4

The correct answer provides an accurate description of the four lobes of the brain and their respective functions, while the incorrect answers include inaccurate names for the lobes or incorrect functions. Understanding the different lobes of the brain and their functions is essential in understanding brain processes and cognitive abilities.

All nerve processes and neurons outside the Central Nervous System (CNS) connect to sensory receptors, muscles, and internal organs to carry out their functions. The brain, bones, and skin are not directly connected to nerve processes and neurons outside the CNS for signal transmission.

The relationship between neural function and behavior is bi-directional, meaning they both influence each other in a complex way.

Head injury is the most common form of brain damage in people younger than 40 due to accidents or trauma. While strokes, Alzheimer's disease, and brain tumors can also cause brain damage, head injuries are more prevalent in this age group.

Children and older adults are more susceptible to head injuries due to falls because they have less control over their movements (children) or due to age-related balance issues (older adults). Teenagers, young adults, and middle-aged adults typically have better coordination and balance, making them less prone to head injuries from falls.

Head injuries are most commonly seen in males between the ages of 15-30, with motorcycle or car accidents being major contributing factors. Females between 40-60, children under 10, and elderly individuals over 70 are less likely to experience head injuries compared to the specified age group.

Coup and contre coup injuries can result in DAI, a type of brain injury that occurs due to extensive shearing forces that cause widespread damage to nerve fibers in the brain.

Orbitofrontal injuries are often particularly common and devastating due to the jagged nature of the eye sockets and the implications these injuries have on personality, decision making, and other cognitive functions. The incorrect answers provided do not align with the known impact and seriousness of orbitofrontal injuries.

Brain trauma does not typically cause broken bones, hearing loss, or respiratory infections. The symptoms and outcomes of brain trauma are more focused on disruptions within the brain itself.

Damage to the frontal and temporal lobes can result in alterations in social behavior and personality traits due to their roles in cognitive function and emotional regulation.

FAST is an acronym used to help identify the signs of a stroke, where each letter represents a different symptom. The correct answer includes Face drooping, Arm weakness, Speech difficulty, and Time to call 911.

Ischemia leads to a cascade of events that result in cell death due to energy depletion, excitotoxicity, calcium overload, proteolytic enzyme activation, oxidative stress, and inflammation. None of the incorrect answers accurately depict the timeline of events following ischemia, as they misrepresent the sequence of cellular responses leading to neuronal damage and death.

Physiotherapy, antibiotics, and chiropractic adjustments are not commonly used as primary treatments for stroke. The correct treatments typically involve clot busting drugs, mechanical means of clot busting, and therapies to facilitate brain plastic changes.

Laterality indices refer to the measurement of brain activity and lateralization. They help in determining which hemisphere of the brain is more active during certain tasks. In the correct answer, it is explained that negative values indicate more activation in the right hemisphere, while positive values indicate more activation in the left hemisphere, particularly in the temporal lobe and perisylvian region. This understanding helps in interpreting brain function and deficits.

The correct answer divides the nervous system into two main parts - the central nervous system and the peripheral nervous system. The CNS consists of the brain and spinal cord, while the PNS includes all the nerves outside of the CNS. The incorrect answers provide other divisions and components of the nervous system, which are not the primary anatomical divisions.

The nervous system is divided into two main functional divisions: the Central Nervous System (CNS), which includes the brain and spinal cord, and the Peripheral Nervous System (PNS), which consists of nerves outside the brain and spinal cord.

The correct answer refers to physical barriers within the brain that protect it from harm and infections, not external layers like hair, skin, or clothing.

The human brain can be viewed from multiple angles to understand its structure and functions. The correct views are sagittal, coronal, axial, and superior. Each view provides different insights into the brain's anatomy.

Blockage in the ventral portions of the posterior middle cerebral artery is associated with Broca's area in the left hemisphere, which is crucial for language production. Deficits in motor function, vision, and memory are not typically associated with this specific area of the brain.

Gray matter refers to the regions in the central nervous system that are rich in cell bodies and capillaries, while white matter mainly consists of myelinated nerve fibers. Cerebrospinal fluid is a clear, colorless fluid that surrounds the brain and spinal cord, providing cushioning and support. Meninges are the protective membranes that surround the brain and spinal cord.

Behaviour is a complex interplay between genetic predisposition and environmental factors, not solely determined by one or the other.

The correct answer highlights the two main categories of behaviors seen in animals, which are inherited ways of responding and learned actions. The incorrect answers do not accurately represent the dichotomy outlined in the question.

Innate behaviours are behaviors that are instinctual or inherited, rather than learned through experience or influenced solely by the environment. They are relatively fixed and dependent on heredity, exhibiting minimal modification through learning.

Learned behaviors are characterized by their flexibility and dependence on an individual's past experiences or environmental influences, rather than being innate or instinctual.

Behavioral complexity can vary greatly among individuals due to a combination of genetic, environmental, and learned factors.

Neural function can be defined at various levels including the brain, neural cells like neurons and glia, and neurotransmitters. These multiple levels allow for a comprehensive understanding of neural function.

The forebrain is responsible for higher-order brain functions such as conscious behaviors in mammals and birds, while the hippocampus, cerebellum, and brainstem have other specific roles in the brain.

The brainstem is responsible for controlling basic functions such as heart rate, breathing, and sleeping in simpler animals. The other brain structures listed are more involved in higher cognitive functions and emotional processing.