Reflexes

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What is the expected response when the patellar ligament is struck?

Contraction of the quadricep muscle (correct)

Relaxation of the quadricep muscle

Contraction of the hamstrings

No response in any muscle

In the Polysynaptic Reflex, which structure is not directly involved?

Sensory neuron

Muscle (correct)

Skin receptor

Interneuron in spinal cord

What is the main characteristic of a reflex?

Is an automatic reaction that does not involve conscious thought (correct)

Requires conscious thought

Involves sensory information to the brain for interpretation

Involves only the brain

What occurs when the skin between the toes is pinched?

Flexion of the joints Signup and view all the answers

What type of muscles are involved in the Withdrawal Reflex?

Flexor muscles Signup and view all the answers

What happens if too much force is used to elicit a withdrawal reflex?

Testing for pain Signup and view all the answers

Which type of motor neuron originates in the grey matter of the spinal cord and connects directly to the muscle?

LMN Signup and view all the answers

What is a characteristic of LMN damage?

Permanent in most cases Signup and view all the answers

Which spinal functional segment has LMN to the rear legs?

L4-S3 Signup and view all the answers

What does the Menace Response involve?

Blinking in response to a harmful object Signup and view all the answers

Which cranial nerves are involved in the Pupillary Light Reflex?

CN II and CN III Signup and view all the answers

What is assessed in the Panniculus Reflex?

Dorsal touch response Signup and view all the answers

What is the primary function of a reflex arc?

To produce an involuntary response to a stimulus Signup and view all the answers

Which of the following is NOT a component of a typical reflex arc?

Cerebral cortex Signup and view all the answers

What distinguishes a monosynaptic reflex from a polysynaptic reflex?

A monosynaptic reflex involves a single synaptic connection, while a polysynaptic reflex involves multiple synaptic connections Signup and view all the answers

The patellar reflex, also known as the knee-jerk reflex, is an example of a:

Monosynaptic reflex Signup and view all the answers

Which of the following is NOT a step in the monosynaptic reflex arc for the patellar reflex?

Interneuron relays the signal to the motor neuron Signup and view all the answers

What is the primary difference between a response and a reflex?

A response involves the cerebral cortex, while a reflex does not Signup and view all the answers

Which of the following reflexes is monosynaptic?

Patellar reflex Signup and view all the answers

In the reflex arc shown, the neuron labeled #5 is a:

Motor somatic neuron Signup and view all the answers

Which spinal cord segment would an injury affect the lower motor neurons innervating the front limb?

C6 - T2 Signup and view all the answers

Which reflex is mediated by the trigeminal (CN V) and facial (CN VII) nerves?

Palpebral reflex Signup and view all the answers

Which nerve innervates the cutaneous trunci muscle, causing it to twitch in response to a stimulus to the trunk?

Lateral thoracic nerve Signup and view all the answers

Which reflex is mediated by the pudendal nerve, with roots from spinal cord segments S1-S3?

Perineal reflex Signup and view all the answers

Which component of the polysynaptic reflex arc is responsible for the inhibition of muscle contraction?

Interneuron in the spinal cord Signup and view all the answers

What is the primary difference between a reflex and a response?

Reflexes are automatic reactions, while responses require conscious thought Signup and view all the answers

What is the purpose of the withdrawal reflex?

To flex the joints of the pinched limb and coordinate the contraction of flexor muscles Signup and view all the answers

What is the primary function of a reflex arc?

To provide an automatic, rapid response to a stimulus without conscious thought Signup and view all the answers

What is the expected response when the patellar ligament is struck?

Contraction of the quadriceps muscle Signup and view all the answers

What happens if too much force is used to elicit a withdrawal reflex?

The reflex will test for pain instead of the withdrawal response Signup and view all the answers

What is the main difference between monosynaptic and polysynaptic reflexes?

Monosynaptic reflexes involve a single synapse, while polysynaptic reflexes involve multiple synapses. Signup and view all the answers

Which of the following best describes the process of a monosynaptic reflex?

A stimulus causes a direct sensory neuron response without involving an interneuron. Signup and view all the answers

What is the role of an interneuron in a reflex arc?

To connect sensory neurons to motor neurons within the spinal cord. Signup and view all the answers

Which component is NOT part of a typical monosynaptic reflex arc?

Interneuron Signup and view all the answers

What initiates a monosynaptic reflex like the patellar reflex?

Stretch on the tendon Signup and view all the answers

Which term best describes a reflex that tests a very specific area and is rapid in nature?

Stretch reflex Signup and view all the answers

What is a characteristic of UMN damage?

Exaggerated muscle tone Signup and view all the answers

Which spinal cord segment has UMN innervating the front limbs?

Higher Cervical C1-C5 Signup and view all the answers

What type of reflex is the Pupillary Light Reflex?

Autonomic Signup and view all the answers

Which type of motor neurons communicate directly with muscles in the peripheral nervous system?

Lower Motor Neurons (LMN) Signup and view all the answers

What characteristic distinguishes the Menace Response from other reflexes?

Involves communication with the cerebrum Signup and view all the answers

Which cranial nerve is involved in the Panniculus Reflex?

CN V (Trigeminal nerve) Signup and view all the answers

Which reflex is mediated by the lateral thoracic nerve that supplies motor innervation to the cutaneous trunci muscle?

Cutaneous trunci reflex Signup and view all the answers

Which of the following reflexes involves the orbicularis oculi muscle contracting in response to touching the eyelid?

Palpebral reflex Signup and view all the answers

Which spinal cord segment would an injury affect the lower motor neurons that innervate the rear limbs?

L4 - S3 Signup and view all the answers

Which component of the reflex arc is represented by the arrow labeled #5 in the image?

Motor neuron Signup and view all the answers

Which of the following reflexes is mediated by the pudendal nerve with roots from spinal cord segments S1-S3?

Perineal reflex Signup and view all the answers

Which of the following reflexes is described as monosynaptic in the provided text?

Patellar reflex Signup and view all the answers

Reflexes

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Questions and Answers

What is the expected response when the patellar ligament is struck?

In the Polysynaptic Reflex, which structure is not directly involved?

What is the main characteristic of a reflex?

What occurs when the skin between the toes is pinched?

What type of muscles are involved in the Withdrawal Reflex?

What happens if too much force is used to elicit a withdrawal reflex?

Which type of motor neuron originates in the grey matter of the spinal cord and connects directly to the muscle?

What is a characteristic of LMN damage?

Which spinal functional segment has LMN to the rear legs?

What does the Menace Response involve?

Which cranial nerves are involved in the Pupillary Light Reflex?

What is assessed in the Panniculus Reflex?

What is the primary function of a reflex arc?

Which of the following is NOT a component of a typical reflex arc?

What distinguishes a monosynaptic reflex from a polysynaptic reflex?

The patellar reflex, also known as the knee-jerk reflex, is an example of a:

Which of the following is NOT a step in the monosynaptic reflex arc for the patellar reflex?

What is the primary difference between a response and a reflex?

Which of the following reflexes is monosynaptic?

In the reflex arc shown, the neuron labeled #5 is a:

Which spinal cord segment would an injury affect the lower motor neurons innervating the front limb?

Which reflex is mediated by the trigeminal (CN V) and facial (CN VII) nerves?

Which nerve innervates the cutaneous trunci muscle, causing it to twitch in response to a stimulus to the trunk?

Which reflex is mediated by the pudendal nerve, with roots from spinal cord segments S1-S3?

Which component of the polysynaptic reflex arc is responsible for the inhibition of muscle contraction?

What is the primary difference between a reflex and a response?

What is the purpose of the withdrawal reflex?

What is the primary function of a reflex arc?

What is the expected response when the patellar ligament is struck?

What happens if too much force is used to elicit a withdrawal reflex?

What is the main difference between monosynaptic and polysynaptic reflexes?

Which of the following best describes the process of a monosynaptic reflex?

What is the role of an interneuron in a reflex arc?

Which component is NOT part of a typical monosynaptic reflex arc?

What initiates a monosynaptic reflex like the patellar reflex?

Which term best describes a reflex that tests a very specific area and is rapid in nature?

What is a characteristic of UMN damage?

Which spinal cord segment has UMN innervating the front limbs?

What type of reflex is the Pupillary Light Reflex?

Which type of motor neurons communicate directly with muscles in the peripheral nervous system?

What characteristic distinguishes the Menace Response from other reflexes?

Which cranial nerve is involved in the Panniculus Reflex?

Which reflex is mediated by the lateral thoracic nerve that supplies motor innervation to the cutaneous trunci muscle?

Which of the following reflexes involves the orbicularis oculi muscle contracting in response to touching the eyelid?

Which spinal cord segment would an injury affect the lower motor neurons that innervate the rear limbs?

Which component of the reflex arc is represented by the arrow labeled #5 in the image?

Which of the following reflexes is mediated by the pudendal nerve with roots from spinal cord segments S1-S3?

Which of the following reflexes is described as monosynaptic in the provided text?

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