Top videos

What is an orgasm?
What is an orgasm? samer kareem 17,515 Views • 2 years ago

Orgasm is the sudden discharge of accumulated sexual excitement during the sexual response cycle, resulting in rhythmic muscular contractions in the pelvic region characterized by sexual pleasure

Massive Dermoid Cyst
Massive Dermoid Cyst samer kareem 2,703 Views • 2 years ago

The term dermoid cyst does not appear to be restricted to a single kind of lesion nor is it used in only a single medical discipline. The term dermoid cyst can be found in the vocabulary of dermatologists, dermatopathologists, general pathologists, gynecologists, neurosurgeons, or pediatricians. If asked, all of these clinicians would most probably define and describe dermoid cysts differently. For example, gynecologists and general pathologists might say that a dermoid cyst is a cystic tumor of the ovary. In contrast, neurosurgeons tend to view a dermoid cyst is associated with a congenital cyst of the spine or an intracranial congenital cyst. For pediatricians and dermatologists, dermoid cyst means subcutaneous cysts, which are usually congenital.[1]

Esophageal Dilation Procedure
Esophageal Dilation Procedure samer kareem 4,511 Views • 2 years ago

What is Esophageal Dilation?Esophageal dilation is a procedure that allows your doctor to dilate, or stretch, a narrowed area of your esophagus [swallowing tube]. Doctors can use various techniques for this procedure. Your doctor might perform the procedure as part of a sedated endoscopy. Alternatively, your doctor might apply a local anesthetic spray to the back of your throat and then pass a weighted dilator through your mouth and into your esophagus. Why is it Done? The most common cause of narrowing of the esophagus, or stricture, is scarring of the esophagus from reflux of acid occurring in patients with heartburn.

How to Insert a Tampon
How to Insert a Tampon samer kareem 17,980 Views • 2 years ago

How to Insert a Tampon

Huge Sebaceous Cyst Removal Video
Huge Sebaceous Cyst Removal Video Scott 5,998 Views • 2 years ago

Huge Sebaceous Cyst Removal Medical Video procedure

Breast Crawl Self Attachment
Breast Crawl Self Attachment samer kareem 22,183 Views • 2 years ago

The importance of uninterrupted contact between mother and newborn SHOW MORE

Pterygium excision and conjunctival autograft
Pterygium excision and conjunctival autograft Mohamed 10,173 Views • 2 years ago

Pterygium excision and conjunctival autograft

Femoral Hernia Examination
Femoral Hernia Examination Mohamed 40,157 Views • 2 years ago

A video showing the examination of femoral hernia.

Aortic Cannulation and Decannulation
Aortic Cannulation and Decannulation samer kareem 9,464 Views • 2 years ago

Cardiac Surgical Skills LaboratoryTraining Procedures:/n Aortic Cannulation and Decannulation/nCardiac surgery training

Neurotransmitter in action 3D Animation
Neurotransmitter in action 3D Animation Mohamed 19,750 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

Hypertension Urgency
Hypertension Urgency samer kareem 3,045 Views • 2 years ago

Hypertensive emergencies encompass a spectrum of clinical presentations in which uncontrolled blood pressures lead to progressive or impending end-organ dysfunction. In these conditions, the BP should be lowered aggressively over minutes to hours. Neurologic end-organ damage due to uncontrolled BP may include hypertensive encephalopathy, cerebral vascular accident/cerebral infarction, subarachnoid hemorrhage, and/or intracranial hemorrhage.[1] Cardiovascular end-organ damage may include myocardial ischemia/infarction, acute left ventricular dysfunction, acute pulmonary edema, and/or aortic dissection. Other organ systems may also be affected by uncontrolled hypertension, which may lead to acute renal failure/insufficiency, retinopathy, eclampsia, or microangiopathic hemolytic anemia.[1] With the advent of antihypertensives, the incidence of hypertensive emergencies has declined from 7% to approximately 1% of patients with hypertension.[2] In addition, the 1-year survival rate associated with this condition has increased from only 20% (prior to 1950) to a survival rate of more than 90% with appropriate medical treatment

Stress Urinary Incontinence
Stress Urinary Incontinence samer kareem 3,793 Views • 2 years ago

Urinary incontinence is the unintentional loss of urine. Stress incontinence happens when physical movement or activity — such as coughing, sneezing, running or heavy lifting — puts pressure (stress) on your bladder. Stress incontinence is not related to psychological stress. Stress incontinence differs from urge incontinence, which is the unintentional loss of urine caused by the bladder muscle contracting, usually associated with a sense of urgency. Stress incontinence is much more common in women than men. If you have stress incontinence, you may feel embarrassed, isolate yourself, or limit your work and social life, especially exercise and leisure activities. With treatment, you'll likely be able to manage stress incontinence and improve your overall well-being.

Medical Video - Abortion Surgery
Medical Video - Abortion Surgery Paul Jensen 159,375 Views • 2 years ago

Surgical abortion using the dilatation and curretage technique.

USMLE Step 2 CS - Acute  Abdomen
USMLE Step 2 CS - Acute Abdomen usmle tutoring 9,221 Views • 2 years ago

USMLE Step 2 CS - Acute Abdomen- This is just preview video. To get full access please visit our website : www.usmletutoring.com

USMLE Step 2 CS - Antenatal Visit
USMLE Step 2 CS - Antenatal Visit usmle tutoring 5,595 Views • 2 years ago

USMLE Step 2 CS - Antenatal Visit This is just preview video. To get full access please visit our website : www.usmletutoring.com

Obese Autopsy & cause of death
Obese Autopsy & cause of death samer kareem 6,113 Views • 2 years ago

Autopsy of a 56 year-old obese woman was suffering from Heart failure due to excess fat intake which cause heart diseases to her followed by Death.

Shaken baby Syndrome !
Shaken baby Syndrome ! samer kareem 2,167 Views • 2 years ago

Shaken baby syndrome usually occurs when a parent or caregiver severely shakes a child in frustration or anger, often because the child won't stop crying. Permanent brain damage or death may result. Symptoms include irritability, difficulty staying awake, seizures, abnormal breathing, poor eating, bruises, and vomiting. Treatment will vary depending on complications related to shaken baby syndrome. In rare instances, breathing support or surgery may be needed to stop bleeding in the brain.

Facial Plastic Surgery
Facial Plastic Surgery samer kareem 21,448 Views • 2 years ago

Cosmetic facial plastic surgery is surgery performed to enhance visual appearance of the facial structures and features. Common procedures include facelifts, eye lifts, rhinoplasty, chin and cheek implants, liposuction, and procedures to correct facial wrinkles.

How to Stop Arterial Bleeding
How to Stop Arterial Bleeding hooda 20,482 Views • 2 years ago

Watch that video to know How to Stop Arterial Bleeding

St Albert Physiotherapy, Massage Therapy, IMS Therapy
St Albert Physiotherapy, Massage Therapy, IMS Therapy St Albert Physiotherapy 1,582 Views • 2 years ago

Body Restoration Physiotherapy has successfully been serving the area of St. Albert and Edmonton for over 23 years. They offer services such as; vestibular rehabilitation, physiotherapy, registered massage therapy, acupuncture, radial shockwave therapy, and IMS therapy. Many individuals come to Body Restoration when in need of any physical therapy services.

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