It is a reflexive action mediated by cells in the spinal cord, bypassing the brain altogether.
introduction of a hollow needle into the subarachnoid space of the spinal canal, usually for the purpose of collecting a sample of cerebrospinal fluid, to introduce radiopaque material for myelography, or the injection of an anesthetic. spinal reflex. any reflex action mediated through a center at the spinal cord. cough reflex the sequence of events initiated by the sensitivity of the lining of the airways and mediated by the medulla as a consequence of impulses transmitted by the vagus nerve, resulting in coughing, i.e., the clearing of the passageways of foreign matter. spinal reflex. (neuroscience). A reflex mediated through the spinal cord without the participation of the more cephalad structures of the brain or spinal cord. Segmental spinal reflexes occur within a single segment of the spinal cord, and intersegmental spinal reflexes enter and emerge from different spinal segments. Depending on the structure of the reflex arcs, spinal reflexes may be monosynaptic or polysynaptic. A spinal reflex is a reflexive action mediated by cells in the spinal cord, bypassing the brain altogether. A classic example is the kneejerk or patellar reflex, where the leg jerks when the kneecap is struck with a brisk tap. A spinal reflex will bypass the brain and is an action only by the cells in the spinal cord. The knee jerk is an example of the simplest type of reflex. When the knee is tapped, the nerve that receives this stimulus sends an impulse to the spinal cord, where it is relayed to a motor nerve. This causes the quadriceps muscle at the front of the thigh to contract and jerk the leg up. This reflex, or simple reflex arc, involves only two nerves and one synapse. cough reflex the sequence of events initiated by the sensitivity of the lining of the airways and mediated by the medulla as a consequence of impulses transmitted by the vagus nerve, resulting in coughing, i.e., the clearing of the passageways of foreign matter. This refers to a reflex that involves neural circuits in the spinal cord, often controlling posture or locomotion that is sometimes classed as segmental reflexes. Such reflexes that are required brain activity are suprasegmental reflexes. SPINAL REFLEX: The spinal reflex controls our posture and movement..  A spinal reflex is an automatic, rapid response to a stimulus. The action is involuntary and occurs without any involvement of thought or the brain. In humans, this action occurs through a neural pathway called the reflex arc.  The stretch reflex (myotatic reflex) is a muscle contraction in response to stretching within the muscle. It is a monosynaptic reflex which provides automatic regulation of skeletal muscle length. When a muscle lengthens, the muscle spindle is stretched and its nerve activity increases.  A knee jerk is a spinal reflex. In a spinal reflex, a sensation is relayed to neurons in the spinal cord via a sensory pathway. Neurons in the spinal cord create reflexes that occur independent of the brain. The spinal nerves, which carry signals to and from the brain, make most of the body's functions, such as movement, and senses, possible. A spinal reflex will bypass the brain and is an action only by the cells in the spinal cord. a reflex whose center is located in the spinal cord. There are four types of spinal reflexes: somatic (motor), autonomic, segmental, and intersegmental. Segmental spinal reflexes occur within a single segment of the spinal cord, and intersegmental spinal reflexes enter and emerge from different spinal segments. Depending on the structure of the reflex arcs, spinal reflexes may be monosynaptic or polysynaptic. Nerve pathway of a simple reflex. When the sensory nerve ending is stimulated, a nerve impulse travels along a sensory (afferent) neuron to the spinal cord. Here an association neuron transfers the impulse to a motor (efferent) neuron. cough reflex the sequence of events initiated by the sensitivity of the lining of the airways and mediated by the medulla as a consequence of impulses transmitted by the vagus nerve, resulting in coughing, i.e., the clearing of the passageways of foreign matter.
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spinal reflex definition