Top videos

Use of Osteoporosis Drug May Cause Bone Fractures
Use of Osteoporosis Drug May Cause Bone Fractures Osteoporosis_Doctor 7,462 Views • 2 years ago

Treating osteoporosis with bisphosphonates, particularly for more than five years, has been linked to some side effects, including atypical femur fractures. Osteoporosis medications are supposed to prevent bone breaks. But if they are taken for too long, the opposite can happen. This video highlights what you need to know as a healthcare professional to educate patients

Chest Gunshot
Chest Gunshot samer kareem 25,898 Views • 2 years ago

Gunshot wounds have become increasing common in urban cities and many such cases can lead to undesirable outcomes. While gunshot wounds to the head are considered most lethal, gunshot wounds to the chest too may be dangerous. Gunshot wound to the chest is challenging owing to the presence of vital organs like lungs, heart and their surrounding structures including major blood vessels. Gunshot wound is caused by penetration of the bullet, which travels through a projectile path after being shot from a firearm. The bullet, on hitting the chest, punctures the tissue it first encounters with, the bones or the muscular chest wall. The extent and severity of the injury depends on the characteristics of the bullet and the firearm, the position and the distance of the victim, the projectile path and the nature of the tissue penetrated.

Pulling a long gauze out from face
Pulling a long gauze out from face samer kareem 60,239 Views • 2 years ago

watch that video of Pulling out 1 foot long foot of gauze out from face

Breast pain after pregnancy
Breast pain after pregnancy samer kareem 23,393 Views • 2 years ago

For the first few days after giving birth, a new mother’s breasts remain soft. They will produce colostrum. Colostrum, the first milk, is available in just the right amount, and is rich in immune factors that protect newborns. Sometime during the next few days, the breasts will become full, firm, warm, and perhaps tender. When this occurs, people say: “the milk is coming in!” The scientific term for this event is: engorgement. Engorgement is normal, and lasts for various periods of time depending on the individual woman. Some women experience only a day or so of mild, easy-to-manage engorgement. For other women, engorgement may be more intense, and can last from several days to two weeks.

Chest x-ray interpretation -- COPD and Emphysema
Chest x-ray interpretation -- COPD and Emphysema academyo 27,159 Views • 2 years ago

The video will describe radiologic features of Emphysema on a chest x-ray. Please see my website for disclaimer.

Newborn Resuscitation!
Newborn Resuscitation! samer kareem 2,259 Views • 2 years ago

Sengstaken Blakemore tube Insertion Video
Sengstaken Blakemore tube Insertion Video Mohamed Ibrahim 48,426 Views • 2 years ago

Sengstaken Blakemore tube Insertion Video

Comfortable positions for breastfeeding
Comfortable positions for breastfeeding samer kareem 8,341 Views • 2 years ago

This video is intended primarily for mothers in the developing world, but may be helpful to breastfeeding mothers worldwide.

Newborn Diagnostic Testing
Newborn Diagnostic Testing samer kareem 1,680 Views • 2 years ago

Examination of the Lower Limbs
Examination of the Lower Limbs Doctor 77,894 Views • 2 years ago

Medical Examination of the Lower Limbs

Leg Length Difference
Leg Length Difference Doctor 19,391 Views • 2 years ago

Demonstration of how to differentiate between a true and an apparent leg length difference. The subject is a female with a true short femur.

Dental Cavity
Dental Cavity samer kareem 4,502 Views • 2 years ago

If it is not removed, tooth decay will begin. The acids in plaque damage the enamel covering your teeth. It also creates holes in the tooth called cavities. Cavities usually do not hurt, unless they grow very large and affect nerves or cause a tooth fracture.

Esophageal Stent
Esophageal Stent samer kareem 1,875 Views • 2 years ago

An esophageal stent is a flexible mesh tube, approximately 2cm (3/4 inch) wide, and is placed through the constricted area of your esophagus (food tube) to allow food and beverages to pass from your mouth to your stomach for digestion and absorption of nutrients.

Abnormal Female Genital Bleeding Causes
Abnormal Female Genital Bleeding Causes hooda 4,002 Views • 2 years ago

Watch that video to know the Abnormal Female Genital Bleeding Causes

Brain Concussion Recognize and Report
Brain Concussion Recognize and Report Surgeon 6,532 Views • 2 years ago

Brain Concussion Recognize and Report

Neurotransmitter in action 3D Animation
Neurotransmitter in action 3D Animation Mohamed 19,756 Views • 2 years ago











Neurotransmitter 3D Animation
on Tuesday, December 21, 2010




Neurotransmitters are endogenous chemicals which transmit signals from a neuron to a target cell across a synapse. Neurotransmitters are packaged into synaptic vesicles clustered beneath the membrane on the presynaptic side of a synapse, and are released into the synaptic cleft, where they bind to receptors in the membrane on the postsynaptic side of the synapse. Release of neurotransmitters usually follows arrival of an action potential at the synapse, but may also follow graded electrical potentials. Low level "baseline" release also occurs without electrical stimulation. Neurotransmitters are synthesized from plentiful and simple precursors, such as amino acids, which are readily available from the diet and which require only a small number of biosynthetic steps to convert. The chemical identity of neurotransmitters is often difficult to determine experimentally. For example, it is easy using an electron microscope to recognize vesicles on the presynaptic side of a synapse, but it may not be easy to determine directly what chemical is packed into them. The difficulties led to many historical controversies over whether a given chemical was or was not clearly established as a transmitter. In an effort to give some structure to the arguments, neurochemists worked out a set of experimentally tractable rules. According to the prevailing beliefs of the 1960s, a chemical can be classified as a neurotransmitter if it meets the following conditions: * There are precursors and/or synthesis enzymes located in the presynaptic side of the synapse. * The chemical is present in the presynaptic element. * It is available in sufficient quantity in the presynaptic neuron to affect the postsynaptic neuron; * There are postsynaptic receptors and the chemical is able to bind to them. * A biochemical mechanism for inactivation is present. There are many different ways to classify neurotransmitters. Dividing them into amino acids, peptides, and monoamines is sufficient for some classification purposes. Major neurotransmitters: * Amino acids: glutamate, aspartate, D-serine, γ-aminobutyric acid (GABA), glycine * Monoamines and other biogenic amines: dopamine (DA), norepinephrine (noradrenaline; NE, NA), epinephrine (adrenaline), histamine, serotonin (SE, 5-HT), melatonin * Others: acetylcholine (ACh), adenosine, anandamide, nitric oxide, etc. In addition, over 50 neuroactive peptides have been found, and new ones are discovered regularly. Many of these are "co-released" along with a small-molecule transmitter, but in some cases a peptide is the primary transmitter at a synapse. β-endorphin is a relatively well known example of a peptide neurotransmitter; it engages in highly specific interactions with opioid receptors in the central nervous system. Single ions, such as synaptically released zinc, are also considered neurotransmitters by some[by whom?], as are some gaseous molecules such as nitric oxide (NO) and carbon monoxide (CO). These are not classical neurotransmitters by the strictest definition, however, because although they have all been shown experimentally to be released by presynaptic terminals in an activity-dependent way, they are not packaged into vesicles. By far the most prevalent transmitter is glutamate, which is excitatory at well over 90% of the synapses in the human brain. The next most prevalent is GABA, which is inhibitory at more than 90% of the synapses that do not use glutamate. Even though other transmitters are used in far fewer synapses, they may be very important functionally—the great majority of psychoactive drugs exert their effects by altering the actions of some neurotransmitter systems, often acting through transmitters other than glutamate or GABA. Addictive drugs such as cocaine and amphetamine exert their effects primarily on the dop

True Story: Youngest Mother In History (5 years old)
True Story: Youngest Mother In History (5 years old) Mohamed Ibrahim 4,127 Views • 2 years ago

Real Story: Youngest Mother In History (5 years old) Pregnant FIVE YEAR OLD! Youngest Mother In The World, Lina Medina's True Story!

How a wisdom tooth is removed
How a wisdom tooth is removed samer kareem 7,739 Views • 2 years ago

A wisdom tooth or third molar is one of the three molars per quadrant of the human dentition. It is the most posterior of the three. Wisdom teeth generally erupt between the ages of 17

Crohns Disease Patient Education
Crohns Disease Patient Education Surgeon 6,972 Views • 2 years ago

Crohns Disease Patient Education

Ultrasound of the Thyroid and Parathyroid Glands
Ultrasound of the Thyroid and Parathyroid Glands Colin Cummins-White 17,647 Views • 2 years ago

• Define and use related medical terminology.
• Describe and demonstrate techniques for imaging the thyroid gland.
• Discuss functional abnormalities of the thyroid gland.
• Correlate laboratory data relevant to the thyroid and parathyroid glands.
• Describe, and recognize on images, pathologies of the thyroid gland.
• Identify the anatomy of the parathyroid glands on diagrams and sonograms.
• Describe and demonstrate techniques for imaging the parathyroid glands.
• Describe, and recognize on images, pathologies of the parathyroid glands.
• List and describe other neck masses.
• Follow relevant protocols when scanning.
• Differentiate the sonographic appearances of the female reproductive organs in relation to the menstrual cycle, the use of contraceptives and hormone replacement, and following chemotherapy.
• Explain the Patient Privacy Rule (HIPAA) and Patient Safety Act (see reference).

Showing 68 out of 373