Which Reflex has a contralateral component?
An example of this is when a person steps on a nail: The leg that is stepping on the nail pulls away, while the other leg takes the weight of the whole body. The crossed extensor reflex is contralateral, meaning the reflex occurs on the opposite side of the body from the stimulus.
Which is not required for a reflex arc?
A reflex does not require any thought input. The path taken by the nerve impulses in a reflex is called a reflex arc. In higher animals, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord.
Which nerve does not arise from the brachial plexus?
|WHAT NERVE DOES NOT ARISE FROM THE BRACHIAL PLEXUS||PHRENIC|
|TRUE OR FALSE BARORECEPTOR IS AN EXAMPLE OF AN EXTEROCEPTER||FALSE|
|WHAT IS NOT A MAIN LEVEL OF NEURAL INTEGRATION IN THE SOMATOSENSORY SYSTEM||SEGMENTAL|
|THE POSTERIOR SIDE OF THE THIGH, LEG, AND FOOT IS SERVED BY THE_______ NERVE||TIBIAL NERVE|
What motor structure inhibits the motor cortex at rest?
What motor structure inhibits the motor cortex at rest? The basal nuclei inhibit motor centers at rest but release that inhibition to allow for motor activity.
What is an example of a Polysynaptic reflex?
For example, stimulation of pain receptors in the skin initiates a withdrawal reflex, which involves several synapses with several motor neurons and results in the removal of the organism or part from the stimulus.
What is the most common type of neuron in the brain?
Motor neurons have the most common type of ‘body plan’ for a nerve cell – they are multipolar, each with one axon and several dendrites.
Who controls reflex?
Reflex actions are those actions takes place along with stimuli. These actions are controlled by the medulla oblongata or the mid brain. These actions are controlled by spinal cord.
What is the correct order of the reflex arc?
So the reflex arc consists of these five steps in order -sensor, sensory neuron, control center, motor neuron, and muscle. These five parts work as a relay team to take information up from the sensor to the spinal cord or brain and back down to the muscles.
What is the correct path of a reflex arc?
When the receptor detects the stimulus, it excites a sensory neuron. The message travels through the sensory neuron to an interneuron in the central nervous system (labeled control center). The message travels through the interneuron to a motor neuron. The message travels through the motor neuron to the effector.
What is the largest and longest nerve of the body?
The sciatic nerve is the largest nerve in your body. It begins in your lower back and travels all the way down to the heel of your foot.
What nerves arise from the brachial plexus?
The trunks of the brachial plexus pass between the anterior and middle scalene muscles. The ventral rami of C5 and C6 unite to form the upper trunk. The suprascapular nerve and the nerve to the subclavius arise from the upper trunk.
What is the largest nerve arising from the lumbar plexus?
The femoral nerve ranks as the largest nerve that arises from the lumbar plexus. It is created from lumbar spinal nerves L2, L3, and L4. Its principal function is to supply motor and sensory innervation to the anterior compartment of the thigh.
What are the 4 motor areas of the cerebral cortex?
These areas are the primary motor cortex (Brodmann’s area 4), the premotor cortex, and the supplementary motor area (Figure 3.1). Electrical stimulation of these areas elicits movements of particular body parts.
What nerve is responsible for hearing?
The vestibular nerve is primarily responsible for maintaining body balance and eye movements, while the cochlear nerve is responsible for hearing.
Which type of stimulus would activate nociceptors of the skin?
Which type of stimulus would activate nociceptors of the skin? Nociceptors respond to stimuli that might damage the body, experienced as pain. These stimuli might include extreme heat or cold, excessive pressure, or inflammatory chemicals.