Human back

The human back is the large posterior area of the human body, rising from the top of the buttocks to the back of the neck and the shoulders. It is the surface opposite to the chest, its height being defined by the vertebral column (commonly referred to as the spine or backbone) and its breadth being supported by the ribcage and shoulders. The spinal canal runs through the spine and provides nerves to the rest of the body.

Structure

The central feature of the human back is the vertebral column, specifically the length from the top of the thoracic vertebrae to the bottom of the lumbar vertebrae, which houses the spinal cord in its spinal canal, and which generally has some curvature that gives shape to the back. The ribcage extends from the spine at the top of the back (with the top of the ribcage corresponding to the T1 vertebra), more than halfway down the length of the back, leaving an area with less protection between the bottom of the ribcage and the hips. The width of the back at the top is defined by the scapula, the broad, flat bones of the shoulders.

Vertigo

Vertigo is when a person feels as if they or the objects around them are moving when they are not. Often it feels like a spinning or swaying movement. This may be associated with nausea, vomiting, sweating, or difficulties walking. It is typically worsened when the head is moved. Vertigo is the most common type of dizziness.

The most common diseases that result in vertigo are benign paroxysmal positional vertigo, Ménière's disease, and labyrinthitis. Less common causes include stroke, brain tumors, brain injury, multiple sclerosis, and migraines. Physiologic vertigo may occur following being exposed to motion for a prolonged period such as when on a ship or simply following spinning with the eyes closed. Other causes may include toxin exposures such as to carbon monoxide, alcohol, or aspirin. Vertigo is a problem in a part of the vestibular system. Other causes of dizziness include presyncope, disequilibrium, and non-specific dizziness.

Benign paroxysmal positional vertigo is more likely in someone who gets repeated episodes of vertigo with movement and are otherwise normal between these episodes. The episodes of vertigo should last less than one minute. The Dix-Hallpike test typically produces a period of rapid eye movements known as nystagmus in this condition. In Ménière's disease there is often ringing in the ears, hearing loss, and the attacks of vertigo last more than twenty minutes. In labyrinthitis the onset of vertigo is sudden and the nystagmus occurs without movement. In this condition vertigo can last for days. More severe causes should also be considered. This is especially true if other problems such as weakness, headache, double vision, or numbness occur.

Black operation

A black operation or black op is a covert operation by a government, a government agency, or a military organization. This can include activities by private companies or groups. Key features of a black operation are that it is secret and it is not attributable to the organization carrying it out. The main difference between a black operation and one that is merely secret is that a black operation involves a significant degree of deception, to conceal who is behind it or to make it appear that some other entity is responsible ("false flag" operations).

A single such activity may be called a "black bag operation"; that term is primarily used for covert or clandestine surreptitious entries into structures to obtain information for human intelligence operations. Such operations are known to have been carried out by the FBI, the Central Intelligence Agency,Mossad, MI6, ISI (Pakistan), RAW, MSS, and the intelligence services of other nations.

Etymology

"Black" may be used as a generic term for any government activity that is hidden or secret. For example, some activities by military and intel agencies are funded by a classified "black budget," of which the details, and sometimes even the total, are hidden from the public and from most congressional oversight.

Physical therapy

Physical therapy or physiotherapy (often abbreviated to PT) is a physical medicine and rehabilitation specialty that remediates impairments and promotes mobility, function, and quality of life through examination, diagnosis, prognosis, and physical intervention (therapy using mechanical force and movements). It is carried out by physical therapists (known as physiotherapists in most countries)

In addition to clinical practice, other activities encompassed in the physical therapy profession include research, education, consultation, and administration. In many settings, physical therapy services may be provided alongside, or in conjunction with, other medical services.

Overview

Originality

Originality is the aspect of created or invented works by as being new or novel, and thus can be distinguished from reproductions, clones, forgeries, or derivative works. An original work is one not received from others nor one copied from or based upon the work of others.. It is a work created with a unique style and substance. The term "originality" is often applied as a compliment to the creativity of artists, writers, and thinkers. The idea of originality as we know it was invented by Romanticism, with a notion that is often called romantic originality.

The concept of originality is culturally contingent. It became an ideal in Western culture starting from the 18th century. In contrast, at the time of Shakespeare it was common to appreciate more the similarity with an admired classical work, and Shakespeare himself avoided "unnecessary invention".

Originality in law

In law, originality has become an important legal concept with respect to intellectual property, where creativity and invention have manifest as copyrightable works. In the patent law of the United States and most other countries, only original inventions are subject to protection. In addition to being original, inventions submitted for a patent must also be useful and nonobvious.