Random Flashcards
What is a PEG tube?
A PEG tube allows a nutrient solution to be passed directly into the stomach alleviating the need to chew or swallow food.
What is the Batson venous plexus?
Network of valveless veins that connect the deep pelvic veins and thoracic veins t the internal vertebral venous plexus. Major route of spread of cancer from deep pelvic regions.
What is Lidocaine?
A local anaesthetic that works as a voltage gated Na channel antagonist.
What is a reflex?
An involuntary stereotyped response to a stimulus.
What are tendon jerks?
Reflex muscle contractions produced by muscle stretch. Useful as a neurological test.
What is Jendrassik’s manoeuvre?
manoeuvre wherein the patient clenches the teeth, flexes both sets of fingers into a hook-like form, and interlocks those sets of fingers together. The tendon below the patient’s knee is then hit with a reflex hammer to elicit the patellar reflex.
What is the sensory homunculus?
Somatotopic map in the sensory cortex has a greater representation of body parts (tongue, face, hands) with a high degree of spatial discrimination, represented by the sensory homonculus.
What is a dermatome?
Area of skin innervated by afferent in a single spinal nerve.
What is Treacher Collins syndrome?
Due to disrupted migration of neural crest cells. Leads to under development of zygomatic bones and ears. Mutation in TCOF1 gene- evidence in animal models may show that retionic acid exposure also a cause.
What is Di George syndrome?
Due to 22q11.2 deletion syndrome. Disruption of migration of neural crest cells can lead to cleft palate, cardiac abnormalities, abnormal facies and thymic aplasia.
What is Sellick’s manoeuvre
As pressure (applied during emergency intubation) can be applied to the cricoid cartilage of the larynx to occlude the oesophagus, and thus prevent regurgitation of gastric contents.
