The somatic nervous system is a component of the peripheral nervous system associated with the voluntary control of the body movements via the use of skeletal muscles.
What is an example of somatic nervous system?
Examples of the Somatic Nervous System Response
Striated skeletal muscles under voluntary control receive signals to contract on the basis of stimuli relayed to the CNS. For instance, while walking in a tropical forest, you watch the forest floor for fallen twigs, insects or undergrowth.
What does the somatic sensory do?
The somatic sensory system is one of the phylogenetically oldest sensory systems, evolving before the specialized senses of vision and hearing. This complex system provides information on the spatial limits of the organism by communicating information about the body to the brain through distinct receptors and pathways.
Which cranial nerves are somatic?
Somatic motor (general somatic efferent) neurons.
Innervation is accomplished via the oculomotor, trochlear, abducens, and hypoglossal nerves (CNN III, IV, VI, and XII, respectively).
What do somatic reflexes activate?
Somatic reflexes involve specialized sensory receptors called proprioceptors that monitor the position of our limbs in space, body movement, and the amount of strain on our musculoskeletal system. The effectors involved in these reflexes are located within skeletal muscle.
What happens if the somatic nervous system is damaged?
Impact of Damage to the SNS
Diseases that impact the peripheral nerve fibers of the somatic nervous system can cause what is known as peripheral neuropathy. 4 This leads to nerve damage that causes numbness, weakness, and pain, often in the hands and feet.
Is vision a somatic sense?
Somatic senses (“soma” means body) detect touch, pain pressure, temperature, and tension on the skin and in internal organs. 4. Special senses detect the sensations of taste, smell, hearing, equilibrium, and sight, only in special sense organs in the head region (a phenomenon known as “cephalization”).
What is somatic sensation?
Somatic Sensation: bodily sensations of touch, pain, temperature, vibration, and proprioception. ( Blumenfeld, 276) The process by which the nature and meaning of tactile stimuli are recognized and interpreted by the brain, such as realizing the characteristics or name of an object being touched. (
Can nerves be sensory and motor?
Most of the nerves have both sensory and motor components. Three of the nerves are associated with the special senses of smell, vision, hearing, and equilibrium and have only sensory fibers. Five other nerves are primarily motor in function but do have some sensory fibers for proprioception.
Are cranial nerves somatic?
In the somatic nervous system, the cranial nerves are part of the PNS with the exception of the optic nerve (cranial nerve II), along with the retina. The second cranial nerve is not a true peripheral nerve but a tract of the diencephalon. Cranial nerve ganglia originated in the CNS.
Where is the somatic nervous system?
The somatic nervous system consists of the cell bodies located in either the brainstem or the spinal cord.
What are the 12 cranial nerves and functions?
This article will explore the functions of the cranial nerves and provide a diagram.
- I. Olfactory nerve. The olfactory nerve transmits information to the brain regarding a person’s sense of smell. …
- II. Optic nerve. …
- III. Oculomotor nerve. …
- IV. Trochlear nerve. …
- V. Trigeminal nerve. …
- VI. Abducens nerve. …
- VII. Facial nerve.
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.
Who controls reflex?
A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain.
Are somatic reflexes involuntary?
In addition to regulating the voluntary movements of the body, the somatic nervous system is also responsible for a specific type of involuntary muscle responses known as reflexes, controlled by a neural pathway known as the reflex arc.