Introduction A kind of aphasia called expressive aphasia, commonly referred to as Broca’s aphasia, is characterized by a partial loss of the capacity to create language (spoken, physical, or written), however understanding typically remains unaffected. An individual with expressive aphasia will speak with effort. Speech often includes key content terms but omits function words, such…
What is a Lhermitte’s sign? Lhermitte’s sign, also known as the “barber chair phenomenon,” is a neurological symptom characterized by an electric shock-like sensation that travels down the spine and into the limbs, usually triggered by neck flexion. The sensation often occurs when a person bends their head forward, backward, or turns it to the…
What is the Brachial Plexus? The brachial plexus is a network of nerves that originates from the spinal cord in the neck region and supplies the upper limb, including the shoulder, arm, forearm, and hand. It comes from nerve roots in the spinal cord’s cervical and upper trunk regions (C5-T1). Anatomy of Brachial Plexus: The…
A local circuitry of neurons and ganglia that is located within the gut wall (from the esophagus to the rectum) is known as the submucosal plexus (also known as the Meissner plexus). The gut’s smooth muscle is innervated by it, which is located within the submucosa. The enteric nervous system is made up of the…
What is a Cerebrospinal Fluid? Cerebrospinal fluid (CSF) is a clear or transparent, colorless plasma-like fluid that bathes or cleans the central nervous system (CNS). The system of cavities is established inside the brain and spinal cord, including the ventricles, the subarachnoid cavity of the cerebral cortex, the spinal cord, and the central canal of…
Overview The nervous system is formed by the vast neural networks; signaling within these circuits allows thinking, language, feeling, learning, memory, and all function and sensation. It is well-established that via the plasticity of existing cells our nervous systems can adjust to situations or circumstances not previously encountered, but it also has been shown that…
Introduction The musculocutaneous nerve is a terminal branch of the lateral cord of the brachial plexus that carries fibers of cervical spinal nerves five along seven (i.e., C5, C6, & C7). The musculocutaneous nerve leaves the axilla & rapidly descends into the coracobrachialis muscle fibers. The musculocutaneous nerve supplies the biceps brachii & brachialis muscles…
The sacral plexus is a network of nerve fibers that supply the skin & muscles of the pelvis & lower limb. the sacral plexus is present on the surface of the posterior pelvic wall, anterior to the piriformis muscle. The plexus is formed by the anterior rami (divisions) of the sacral spinal nerves S1, S2,…
What is the spinal cord? The spinal cord is a long, tube-like band of tissue. It connects the brain to the lower back. the spinal cord carries nerve signals from the brain to the body & vice versa. These nerve signals help you feel sensations & move the body. Any injury or disease to the…
What is Klumpke’s Palsy? Klumpke’s palsy, named after Augusta Dejerine-Klumpke, is neuropathy that involves the lower part of the brachial plexus.Usually, the 8th cervical and 1st thoracic nerves are commonly injured either before or after they have joined to form the lower trunk. This injury leads to a stretching (neuropraxia,), tearing (called “avulsion” when the…
