The Babinski reflex is a somatic reflex seen in infants. When the side of the foot is stroked, the toes spread apart. Another example of a somatic reflex is the ankle-jerk reflex, which causes the ankle to bend the foot towards the ground when the Achilles tendon is tapped.Know More
Somatic reflexes are movements of body parts that result nearly instantly when a certain stimulus is delivered. Reflexes are able to occur so quickly because the stimuli that cause them are not processed in the brain. Rather, the nerve impulse generated by the stimulus is relayed only to the spinal cord. A motor nerve impulse, which signals for the muscles to react in a certain way, is then sent back from the spinal cord to the muscle.
Humans display many different reflexes. The biceps reflex causes the forearm to jerk when the biceps brachii is tapped with a hammer. The corneal reflex causes a person to blink when the cornea of the eye is touched, and the knee-jerk reflex causes the lower leg to kick outward when the patellar tendon just beneath the knee cap is struck. Blushing is another reflex; the face turns red when a person experiences embarrassment or shame.Learn more about Nerves
The dendrites, or "tentacles," of a neuron pick up an electrical nerve impulse and conduct it toward the soma, or cell body. The nerve impulse travels through the soma and is then conducted down a threadlike fiber called the axon. At the end of the axon, the impulse travels over a gap called a synapse to reach the dendrites of the next cell.Full Answer >
The function of nervous tissue is to transmit and receive external and internal stimuli. Consisting of two basic types of cells, neurons and glial cells, nervous tissue represents a fundamental aspect of living organisms and can be considered the seat of response to stimuli. Signals from the internal or external environment are received by the neurons and then transmitted as electrical impulses to muscles, glands, the central nervous system or other neurons.Full Answer >
The basic functional unit of the nervous system is the nerve cell, also called a neuron. These cells are specialized to send information through the body in the form of electrical action potentials. These travel from one neuron to the next through special connections called synapses.Full Answer >
The five regions of the spine from the top of the spine to the bottom include the cervical, thoracic, lumbar, sacral and coccygeal regions. These regions contain 33 vertebrae that form the spinal column, according to Mayfield Clinic, and each region has a particular function in the movement of the body.Full Answer >