Trigeminal nerve The trigeminal nerve is the fifth of twelve pairs of cranial nerves enervating the face and head‚ and is denoted by the Roman Numeral V. It has three divisions which enervate the forehead and eye (ophthalmic V1)‚ cheek (maxillary V2) and lower face and jaw (mandibular V3). The trigeminal nerves function in sensing facial touch‚ pain and temperature‚ as well as controlling muscles used for chewing. The trigeminal nerve functions should be distinguished from the facial nerve (cranial
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Cranial Nerves The human body is a unique and fascinating entity. There is not much notice taken of the features the human body is capable of. The brain is necessary to perform day-to-day actions‚ such as the ability to speak‚ and see amongst us. This brain is made up of simple mater (Pia mater‚ Arachnoid mater‚ Dura mater) and the cranial surface to protect the brain. We live our daily lives without acknowledging the importance of this organ‚ the brain‚ unless you’re a medical student of
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Within the body‚ there are billions of cells that are essential to living – these are called nerve cells. Nerve cells‚ also known as neurons‚ “are the basic information processing structures” (Stufflebeam). There are about 100 billion of these neurons in our nervous system and are the most essential cell in it. Located in brain as well as the spinal‚ there are different types of nerve cells; including: sensory neurons‚ motor neurons‚ and interneuron (Boeree). The neuron is a cell that is structured
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Cranial Nerves The brain and spinal cord (CNS) are connected to parts of the body by nerves and cell bodies called the peripheral nervous system. The PNS contains all of the nervous tissue outside the brain and spinal cord. Afferent (sensory) nerve fibers-conduct nerve impulses toward the CNS Efferent (motor) nerve fibers-conduct nerve pulses away Sensory Somatic System – Carries nerve impulses from the senses to the CNS and also carries the impulses to the skeletal muscles and glands
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ETHER THE MAGIC OF PAINLESS SURGERY FIRST USED BY Dr. CRAWFORD LONG(1815-1875) Dr Crawford Williamson Long and ETHER to create painless surgery. In March 1842‚ Dr Crawford Williamson Long removed 2 tumours from the neck of a Mr James Venable under ether anaesthesia. But how did Dr Long come to this discovery? When Dr Crawford Long was at school and at Medical School of the University of Pennsylvania‚ it was fashionable with students to inhale gases like ether to create
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charge. These important ions help regulate homeostasis in our bodies‚ as well as allowing us to move‚ absorb food‚ heal‚ and reproduce. Understanding how these ions work within our bodies will allow us to comprehend the physiology behind muscle contraction‚ nerve signaling and cell signaling. Upon learning about calcium‚ we already briefly know how
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Muscle and Nerve Preparation Preparation of Ringer ’s solution Dissolve 6.5 g of sodium chloride (NaCl)‚ 0.14 g of potassium chloride (KCl)‚ and 0.20 g of sodium bicarbonate (NaHCO3) in 800 mL of distilled water. Also‚ dissolve 0.16 g of hydrated calcium chloride (CaCl2.2H2O) and 0.39 g of hydrated magnesium sulfate (MgSO4.7H2O) in 100 mL of distilled water. Add the 100 mL cautiously to the 800 mL‚ stirring vigorously. Then make the final volume equal to 1 liter by adding more distilled water
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The nerve impulse The information is transmitted by polarity changes in the membranes of cells due to the presence of neurotransmitters that alter the ionic concentration inside the cell. Moreover‚ inside the neuron proteins and ions are negatively charged . This difference in ion concentration also produces a potential difference between the outer membrane and within the cell . The value reached is about -70 millivolts (negative inside with respect to the value of positive charges outside
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A growing number of researchers regard the question of how much heredity and environment contribute to differences among people as Selected Answer: mainly answered by DNA. Question 2 0.5 out of 0.5 points Fetal monitors Selected Answer: track the baby’s heart rate during labor. Question 3 0 out of 0.5 points Patsy and Terry are fraternal twins. This type of twinning results from Selected Answer: the fertilization of one ovum by two Y-bearing sperm
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The article “The Shaking Women or A History of My Nerves” is an intriguing piece to read as it captures the idea of what it’s like struggling with an unknown disorder. The author‚ Siri Hustvedt‚ provides readers with a vision of her journey through the search of a diagnosis for her mysterious‚ shaking episodes. While on her journey‚ the author provides readers with an insight on various theoretical paradigms‚ historical views of abnormal behaviours and disorders as well as personal experiences living
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