Which invertebrates have a brain?

Which invertebrates have a brain?

Two groups of invertebrates have notably complex brains: arthropods (insects, crustaceans, arachnids, and others), and cephalopods (octopuses, squids, and similar molluscs). The brains of arthropods and cephalopods arise from twin parallel nerve cords that extend through the body of the animal.

What do invertebrates have instead of a brain?

Simple invertebrates have small nerve cords throughout their body. These animals have no brain or head. On some animals, the groups of nerve cords form together to form something called a ganglion. This is what controls the movements of certain parts of the body.

Do invertebrates have a spinal cord?

Invertebrates have no backbone, while vertebrates have a well-developed internal skeleton of cartilage and bone and a highly developed brain that is enclosed by a skull. A nerve cord is enclosed by vertebrae — individual bones that make up a vertebrate’s spine.

What are the components of the vertebrate nervous system?

In vertebrates it consists of two main parts, the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord. The PNS consists mainly of nerves, which are enclosed bundles of the long fibers or axons, that connect the CNS to every other part of the body.

What are the 2 types of nervous systems?

The nervous system has two main parts: The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

How do I know if my nervous system is damaged?

Signs and symptoms of nervous system disorders Persistent or sudden onset of a headache. A headache that changes or is different. Loss of feeling or tingling. Weakness or loss of muscle strength.

What happens if EMG is abnormal?

If your EMG shows abnormal electrical activity when a muscle contracts, then you may have a herniated disc or a nerve disorder, such as ALS or carpal tunnel syndrome. Depending on your results, your doctor will talk to you about any additional tests or treatments that might be needed.

How do you treat nerve damage?

How Are Nerve Pain and Nerve Damage Treated?

1. Regulating blood sugar levels for people with diabetes.
2. Correcting nutritional deficiencies.
3. Changing medications when drugs are causing nerve damage.
4. Physical therapy or surgery to address compression or trauma to nerves.
5. Medications to treat autoimmune conditions.