Question 1

Under special circumstances,doctors may decide to severe a person's corpus callosum.This procedure is primarily done to

Accepted Answer

Severing the corpus callosum is a surgical procedure called corpus callosotomy that is most commonly done to reduce the severity and frequency of seizures in patients with epilepsy. This procedure aims to stop or slow down the spread of electrical impulses between the brain's hemispheres, which can trigger seizures. Studies have shown that corpus callosotomy can effectively reduce seizures in patients with severe forms of epilepsy that are difficult to control with medications.

Question 2

Darla suffered from a stroke that left her with an impaired sense of touch.Which part of the brain is the most likely site of the damage?

Accepted Answer

The parietal lobe is responsible for processing sensory information, including touch. Damage to this area of the brain can result in impaired or loss of touch sensation.

Question 3

The corpus callosum

Accepted Answer

The corpus callosum is a bundle of nerves that connects the two halves of the cerebral cortex, allowing for communication and coordination between the two hemispheres. If severed, it can result in split-brain syndrome, but not necessarily a vegetative state. The corpus callosum does not connect the brainstem and reticular formation.

Question 4

Which lobes are primarily involved in hearing,language,and object and face recognition?

Accepted Answer

The temporal lobes are primarily involved in hearing, language, and object and face recognition.

Question 5

Marta was in a skiing accident and suffered an injury to her brain resulting in paralysis of her left arm.What part of Marta's brain was likely injured?

Accepted Answer

The primary motor cortex is responsible for initiating voluntary movements of the body's skeletal muscles. Damage to this area can result in paralysis or weakness on the opposite side of the body. In Marta's case, the injury to her brain likely affected the primary motor cortex controlling movement in her left arm.

Question 6

Neuroscientists often categorize parts of the brain into grey matter and white matter.What makes the white matter regions appear white?

Accepted Answer

White matter is composed of myelinated axons, which are covered in a fatty substance called myelin. This gives them a lighter, white appearance compared to the grey matter, which is mostly composed of cell bodies and dendrites.

Question 7

Small electrodes are pasted onto Miranda's scalp and are connected by wire to a machine that translates the electrical energy from her brain into wavy lines on a moving piece of paper.From this description,it is evident that Miranda's brain is being studied through the use of

Accepted Answer

The use of small electrodes to translate the electrical activity of Miranda's brain into wavy lines on a moving piece of paper is characteristic of an electroencephalogram (EEG), making choice D the best option. This is a non-invasive method of measuring the electrical activity of the brain, and it is often used in the diagnosis of various neurological conditions, as well as in research to study brain function. Choices A, B, and C all refer to other imaging techniques that are not based on the use of electrodes to detect brain activity.

Question 8

"Wow!" says 4-year-old Tristan when he sees an actual human brain on display at the science museum,"I didn't realize how wrinkly it would be." Because he can only see the outer layer of the brain,Tristan is actually describing only the

Accepted Answer

The cerebral cortex is the outer layer of the brain and is responsible for many of the brain's functions, including consciousness, memory, and language. Tristan's description of the brain being wrinkly is likely due to the folds and creases of the cerebral cortex. The other options (white matter, ventricles, cerebellum) are not visible in a display of just the outer layer of the brain.

Question 9

Tareq suffered a brain injury when he hit his head waterskiing.Following the accident,Tareq required extensive speech therapy to regain his ability to pronounce words correctly.Now Tareq can speak as he did before his accident.This is an example of _____________,which allowed the structure and function of Tareq's brain cells to change to adjust to the trauma.

Accepted Answer

Neuroplasticity is the ability of the brain's neurons to change their structure and function in response to environmental or experiential factors, including injury. In this case, Tareq's brain cells were able to reorganize and rewire themselves through speech therapy, allowing him to regain his ability to pronounce words correctly. Split-brain syndrome refers to a condition where the left and right hemispheres of the brain are unable to communicate effectively, while neural pruning is the process by which the brain eliminates unused or unnecessary connections between neurons. Wernicke's aphasia is a type of language disorder that results from damage to a specific area of the brain. None of these options adequately describe Tareq's experience.

Question 10

What part of the brain acts as a relay station for incoming sensory information?

Accepted Answer

The thalamus acts as a relay station for incoming sensory information, receiving sensory inputs from various parts of the body and relaying them to the appropriate regions of the cerebral cortex.

Question 11

While playing hockey,Ryan fell and hit his head on the ice.Afterwards,he reported that he was unable to see although doctors confirmed that his eyes were uninjured.Which area of his brain was likely injured in his fall?

Accepted Answer

The occipital lobe is responsible for processing visual information, so if Ryan is unable to see despite his eyes being uninjured, it is likely that his occipital lobe was injured in the fall.

Question 12

Which of the following is true about the two hemispheres of the brain?

Accepted Answer

Research has shown that the left hemisphere of the brain is more specialized for language and math, while the right hemisphere is more specialized for visual skills and music processing. This does not mean that one hemisphere dominates over the other or that individuals exclusively use one hemisphere over the other. Rather, both hemispheres work together to complete tasks.

Question 13

Which lobes are associated with higher cognitive functions,such as planning,inhibiting impulses and emotion,language production,and voluntary movement?

Accepted Answer

The frontal lobes are associated with higher cognitive functions such as planning, inhibiting impulses and emotion, language production, and voluntary movement.

Question 14

Shyanne was admitted to the hospital last week after she fell.When Shyanne's son visited,he found his mother was unable to get words out in a smooth,connected fashion.If Shyanne's difficulty speaking is due to brain damage,what is the likely location of the damage?

Accepted Answer

Broca's area is responsible for speech production, and damage to this area can lead to difficulty in speaking smoothly and coherently. This is consistent with Shyanne's symptoms of difficulty speaking. Gall's area and Korsakoff's area are not recognized brain regions, and Wernicke's area is responsible for understanding and interpreting language rather than producing it.

Question 15

The wrinkling of the surface of the brain serves what purpose?

Accepted Answer

The wrinkling of the brain, also known as sulci and gyri, increases the surface area of the brain without increasing its overall size. This allows for more neural connections and processing power within the limited space of the skull.

Question 16

Most of the higher functions of the brain,such as reasoning and language,are located in the

Accepted Answer

The cerebral cortex is the outer layer of the brain and is responsible for most of the higher functions, including reasoning and language. The limbic system is involved in emotions and memory, the midbrain is responsible for sensory and motor functions, and the hypothalamus regulates hormones and basic survival behaviors.

Question 17

Dr.Kakembo is interested in the area of the brain responsible for spatial memory.She decides that the best process is to train a group of rats to navigate a maze,then intentionally remove specific areas of their brains,and finally test their spatial memory to see which rats have memory impairments.This technique,intentionally damaging an area of the brain,is known as

Accepted Answer

The technique described in which specific areas of the brain are intentionally damaged is known as lesioning. Transcranial magnetic stimulation is a non-invasive technique that uses magnetic fields to stimulate brain activity. Structural neuroimaging and electroencephalography are both techniques used to visualize and measure brain activity, but they do not involve intentionally damaging the brain.

Question 18

Darren is right-handed.If his brain is like that of most other right-handed people,then he likely uses his _________ to process and produce language.

Accepted Answer

Research has shown that language processing is primarily located in the left hemisphere of the brain for the majority of right-handed people. This includes speech production and comprehension. Therefore, Darren most likely uses his left cerebral hemisphere to process and produce language.

Question 19

Which lobes are involved in our experiences of touch as well as bodily awareness?

Accepted Answer

The parietal lobes are responsible for processing sensory information from the body, including touch and bodily awareness.

Question 20

Researchers have developed a therapy for stroke patients with Broca's aphasia that uses ________________ to encourage neuroplasticity.

Accepted Answer

Singing strings of words has been found to be effective in stimulating the language areas of the brain and promoting neuroplasticity in patients with Broca's aphasia. This therapy is called Melodic Intonation Therapy (MIT) and involves singing simple phrases that gradually become more complex, eventually leading to spoken language production. Electrical stimulation, neurotrophic drugs, and physical exercise have not been found to be as effective in treating Broca's aphasia.

Quiz 3: C: Biological Psychology