Question 1

Whenever you have a tooth filled,you either pinch yourself or dig a fingernail into your knuckle while the dentist is working.In order to control pain,you are using

Accepted Answer

Counterirritation refers to the process of reducing pain in one part of the body by causing irritation in another part of the body. In this case, pinching oneself or digging a fingernail into the knuckle creates a distracting sensation that reduces the perception of pain from the dental work.

Question 2

Regarding phantom limb sensations,which of the following statements is FALSE?

Accepted Answer

While phantom limb sensations and the effects of acupuncture may both involve sensory experiences, they are not explained by the same theory. Phantom limb sensations are thought to be caused by changes in the brain that occur after amputation, while the effects of acupuncture are explained by the stimulation of nerves and release of endorphins. Therefore, option D is false.

Question 3

In general,which of the following would tend to decrease pain?

Accepted Answer

Having some control over the pain has been shown to decrease pain perception. A sense of control can provide a feeling of empowerment and can decrease anxiety, which may contribute to the experience of pain. Unpleasant emotions and focusing directly on the pain have both been shown to increase pain perception.

Question 4

Having burn patients focus on video games while their bandages are being changed is a good example of how pain can be reduced through

Accepted Answer

Distraction techniques are effective in reducing pain perception by diverting attention away from the painful stimulus. Video games are a form of distraction that can be particularly engaging and immersive, making them an effective pain management tool for certain populations such as burn patients undergoing bandage changes. Counterirritation involves applying a mildly painful or irritating stimulus to a different part of the body, such as rubbing or massaging the skin near the site of pain, in order to reduce pain perception. Systematic desensitization is a form of therapy used to treat phobias and anxiety disorders, and involves gradual exposure to the feared stimulus while learning relaxation techniques to reduce anxiety. Paradoxical intention involves encouraging a patient to exaggerate or embrace their symptoms in order to reduce anxiety about them. This technique is typically used to treat anxiety disorders rather than acute pain.

Question 5

The most effective means of reducing a child's pain during dental work is likely to be

Accepted Answer

The most effective means of reducing a child's pain during dental work is by using distraction or counterirritation techniques. Distraction techniques involve providing the child with something to focus on that is unrelated to the pain, such as watching a movie or blowing bubbles. Counterirritation techniques involve providing a mild sensation that distracts the child from the pain, such as vibration or cold spray. These techniques have been found to be more effective than simply assuring the child that the dental work will not be painful, or teaching them to focus on the perceived source of the pain. Sensory assimilation techniques may be helpful, but they are not the most effective means of reducing pain in this context.

Question 6

You are about to undergo a painful medical procedure.Which of the following would increase your subjective feelings of pain?

Accepted Answer

Unpleasant emotions such as fear can increase subjective feelings of pain by activating the body's stress response, which can amplify pain signals. The other options (using distraction, having control over the pain stimulus, being fully informed about the procedure) may help to decrease feelings of pain.

Question 7

Regarding counterirritation,which of the following statements is FALSE?

Accepted Answer

The lock-and-key theory is related to enzyme-substrate interaction and neurotransmitter-receptor binding, not to the concept of counterirritation, which involves distracting the nervous system from pain by introducing another, often less severe, stimulus.

Question 8

Your dentist's conversation with you about the latest episode of your favorite reality show while he puts in a filling is an example of pain control through

Accepted Answer

The dentist is using distraction as a form of pain control by engaging the patient in conversation about a topic of interest to them, rather than focusing on the discomfort of the filling procedure.

Question 9

During an industrial accident,Carl was badly injured and his left leg had to be amputated.For months after the amputation,Carl experienced phantom limb sensations because his brain had created an internal model of his body called

Accepted Answer

Phantom limb sensations occur due to the brain's creation of an internal model of the body called the neuromatrix, which includes multiple brain regions that process information related to touch, movement, and body position. This internal model continues to send signals to the missing limb, which can result in sensations such as tingling, itching, or pain.

Question 10

Weightlessness and space flight tend to cause severe motion sickness because these situations affect the __________ system.

Accepted Answer

Weightlessness and space flight can disrupt the vestibular system, which is responsible for maintaining balance and spatial orientation. As a result, this can cause motion sickness or space adaptation syndrome (SAS), which can include symptoms such as nausea, vomiting, headache, and dizziness. The gustation and olfactory systems are involved in taste and smell, respectively, and are not directly affected by weightlessness or space flight. The auditory system is responsible for hearing and can be affected by sudden loud noises or changes in pressure, but is not the primary cause of motion sickness in these situations.

Question 11

Although a mild electric current is applied to the skin to alleviate milder pain,extreme pain can be treated by applying the current directly to the

Accepted Answer

Extreme pain can be treated by applying the current directly to the spinal cord, as this can intercept and block pain signals before they are sent to the brain. This technique is known as spinal cord stimulation, and it has been shown to be effective in treating chronic pain conditions such as back pain, neuropathic pain, and complex regional pain syndrome. Applying the current to the injured area or the opposite side of the body may not be as effective in treating extreme pain, as these approaches do not directly target the pain signals being sent to the brain. The hippocampus is not the primary area of the brain involved in pain processing, so applying the current there would not be an effective pain treatment.

Question 12

The fluid-filled sacs that are sensitive to movement,acceleration,and gravity and that contain tiny crystals in a soft gelatin-like mass are called the

Accepted Answer

The otolith organs are the only option that mention the presence of tiny crystals and a soft gelatin-like mass, both of which are important components of these organs. Additionally, otolith organs are known to be sensitive to movement, acceleration, and gravity.

Question 13

Regarding ways to reduce pain,which of the following statements is FALSE?

Accepted Answer

The statement that pleasant emotions increase pain is false. In fact, pleasant emotions can help reduce pain by releasing endorphins, which are natural painkillers.

Question 14

You are about to undergo a painful medical procedure.Which of the following would NOT be likely to reduce your pain?

Accepted Answer

Having the painful parts of the procedure occur without any warning would not be likely to reduce the pain. The other options (listening to music, using counterirritation, and having the doctor explain everything) have been shown to have some pain-reducing effects.

Question 15

In some cultures,people endure tattooing,stretching,cutting,and burning with little apparent pain.This phenomenon can be explained by

Accepted Answer

The phenomenon of enduring tattooing, stretching, cutting, and burning with little apparent pain can be explained by psychological factors such as anxiety reduction, control, and attention. Some cultures have rituals or ceremonies that involve these practices, and the individuals who participate may experience a sense of community, belonging, and achievement, which can reduce anxiety and provide a sense of control. Additionally, the attention given to the individual during the procedure may also reduce anxiety and distract from the sensation of pain.

Question 16

A nurse finds that children feel less pain if he gives them reassurance before giving an injection.He should also consider doing any of the following EXCEPT

Accepted Answer

Telling children to think angry thoughts while focusing on the painful injection may actually increase their perception of pain and anxiety. It is not a helpful technique for reducing pain. Choices A, B, and C offer distraction, information, and comfort, respectively, which are all effective techniques for reducing pain and anxiety during medical procedures.

Question 17

Marcella's doctor applies mild electric currents to the skin to alleviate her more agonizing back pain.This is an example of

Accepted Answer

This scenario is an example of counterirritation, which involves applying a mild form of pain or irritation to a specific area of the body to alleviate more intense pain in another area. The mild electric currents applied to Marcella's skin act as a distraction from her back pain and help to alleviate it.

Question 18

In pain clinics,mild electric currents are applied to the skin or directly to the spinal cord.This procedure sends mild pain messages to the spinal cord and brain,which effectively close the neurological gates to reduce the patient's more agonizing pain.This technique is an application of the __________ theory.

Accepted Answer

This procedure is based on the gate control theory, which suggests that the neural impulses responsible for pain can be blocked or modulated by the activation of large-diameter sensory fibers. The mild electric currents activate these fibers, which inhibit the transmission of pain signals through the smaller nerve fibers. This theory has been used to explain the effectiveness of various pain management techniques, including transcutaneous electrical nerve stimulation (TENS) and dorsal column stimulation (spinal cord stimulation).

Question 19

Every time Becky goes to the dentist,she arranges a signal with the doctor that will let him know that she would like him to stop the procedure for a few moments.This signal

Accepted Answer

The signal that Becky arranges with the doctor allows her to regulate and control the painful stimulus, which can help her to suffer less. This approach is based on the gate control theory of pain, which suggests that psychological factors, such as attention and expectation, can influence how much pain we feel. By giving Becky some sense of control over the procedure, she may be able to reduce her perception of pain.

Question 20

Which of the following contribute(s)to our feeling of motion sickness?

Accepted Answer

The otolith organs, located in the inner ear, detect linear acceleration of the head and contribute to our sense of balance and spatial orientation. When there is a mismatch between the visual information and the information from the otolith organs, such as when reading in a moving vehicle, it can lead to motion sickness. The other options (olfactory bulb, auditory ossicles, tympanic membrane) are not directly involved in the sensation of motion sickness.

Quiz 4: B: Sensation and Perception