Active isolated stretching : an investigation of the mechanical mechanisms

The Active Isolated Stretching (AIS) technique proposes that by contracting a muscle (agonist) the opposite muscle (antagonist) will relax through reciprocal inhibition and lengthen without increasing muscle tension (Mattes, 2000). The clinical effectiveness of AIS has been reported but its mechanism of action has not been investigated at the tissue level. Proposed mechanisms for increased range of motion (ROM) include mechanical or neural changes, or an increased stretch tolerance. The purpose of the study was to investigate changes in mechanical properties, i.e. stiffness, of skeletal muscle in response to acute and long-term AIS stretching for the hamstring muscle group. Recreationally active university-aged students (female n=8, male n=2) classified as having tight hamstrings, by a knee extension test, volunteered for the study. All stretch procedures were performed on the right leg, with the left leg serving as a control. Each subject was assessed twice: at an initial session and after completing a 6-week AIS hamstring stretch training program. For both test sessions active knee extension (ROM) to a position of "light irritation", passive resisted torque and stiffness were determined before and after completion of the AIS technique (2x10 reps). Data were collected using a Biodex System 3 Pro (Biodex Medical Systems, NY, USA) isokinetic dynamometer. Surface electromyography (EMG) was used to monitor vastus lateralis (VL) and hamstring muscle activity during the stretching movements. Between test sessions, 2x10 reps of the AIS bent knee hamstring stretch were performed daily for 6-weeks.

Illustration - Drawing of Pig while Blindfolded, 23 July 1900

The illustration of a pig is part of an autograph book collection of Ethelwyn Wetherald. Her collection consists of drawings of pigs her guests create while blindfolded. The signature of each guest accompanies the illustration. This illustration was done by Margaret H. Dorland in the year 1900.

Canadian Niagara Power Glass Slide - Engineer Drawing of Sections of Discharge Tunnel

Consulting Engineer drawing of Sections of the Discharge Tunnel. Included in the drawing is the "cross section of tunnel with timbering" and "longitudinal section showing Timber in straight tunnel". Dated October 1902.

Canadian Niagara Power Glass Slide - Engineer Drawing Hydro Station

Appears to be an engineer's drawing of the Hydro Station. It is a cross-section view of the interior.

Canadian Niagara Power Glass Slide - Drawing: Section thru Wheelpit

Drawing of "Section thru Wheelpit" dated September 1925. Shows unit no.1 through unit no.11, power house floor and water surface.

Canadian Niagara Power Glass Slide - Engineer Drawing (untitled)

Engineer drawing (untitled), some of the labels read "exciter chamber", "fore bay", "power house floor".

Postsecondary Artist Teachers' Responses to Computer Technology in Their Drawing Pedagogy

While the influence of computer technology has been widely studied in a variety of contexts, the drawing teaching studio is a particularly interesting context because of the juxtaposition of traditional medium and computer technology. For this study, 5 Canadian postsecondary teachers engaged in a 2-round Delphi interview process to discuss their responses to computer technology on their drawing pedagogy. Data sources included transcribed interviews. Findings indicated that artist teachers are both cautious to embrace and curious to explore appropriate use of computer technology on their drawing pedagogy. Artist teachers are both critical and optimistic about the influence of computer technology.

Drawing, St. Catharines House on February 26, 1849

A drawing done on paper 50cm x 45cm and mounted in a frame under glass. This is a drawing of a meeting held at the St. Catharines House on February 26, 1849. The drawing was done from memory by W. Osborn who has signed the picture on one of the pillars on the right hand side of the picture. The caption under the picture reads "Act 1st Scene 1st". There is some dialogue, "Woodruff - 'He says gentlemen, my son holds an office under Government, of 400 pounds per year - he forgot to tell you, he sold his constituents at Cornwall' - Macdonald 'You're a liar'". The artist portrays a fight breaking out and lists the characters as Boyd , Rykert, Hobdon, Foley, The Sheriff, Woodruff, J.W.O. Clarke, McDonald, Lamb, Hamilton and Hathaway. There are some very slight wrinkles and tears in the drawing. They do not affect the drawing. [Rolland MacDonald (1810-1881) represented Cornwall in the Legislative Assembly of the Province of Canada from 1844-1846. He was called to the bar in 1832 and set up practice in St. Catharines. The quote on the drawing concerns the constituents at Cornwall. This meeting was covered in reports in the St. Catharines Journal on: March 1, March 8, march 15 and march 22, 1849. There is also an excerpt in William Hamilton Merritt's diary noting the riot and the sketch by Osborn].

The Influence of Sex on the Relationship Between Arterial Mechanical Properties and Cardiovagal Baroreflex Sensitivity

Cardiovagal baroreflex sensitivity (cvBRS) demonstrates a strong relationship with arterial mechanical properties. Both cvBRS and arterial mechanics differ by sex such that males demonstrate greater cvBRS, yet lower large artery elasticity than females. Whether the relationship between cvBRS and arterial mechanics is similar in males and females remains unexamined. As a result, it is unclear whether arterial mechanics contribute to sex differences in cvBRS. This study investigated the cross-sectional relationship between cvBRS and arterial mechanical properties of the common carotid, carotid sinus and aortic arch (AA) in 36 (18 females) young, healthy normotensives. The cvBRS-arterial mechanics relationship did not reach statistical significance and did not differ by sex. Both cvBRS and AA distensibility were greater in females than males. Sex differences in cvBRS were eliminated after controlling for AA distensibility. These findings suggest that in this sample, AA elasticity may contribute to the greater cvBRS in females than males.

Drawing of Dr. Cleavland's Quarters at Camp Parole

Drawing of Dr. Cleaveland’s quarters at the Camp Parole Hospital by Robert F. Roche. This picture is slightly stained, but this does not affect the image, May 20, 1865.

Drawing and Explanation of the Cleveland Family Coat of Arms

Drawing and explanation of the Cleveland Family coat of arms. Pro Deo et Patria means For God and Country. The name is Saxon in origin and in 1403 the “de” was dropped from the name. The drawing and text are said to be from Cleveland Genealogy by J.B. Cleveland, 1881. It can also be found in An Account of the Lineage of General Moses Cleaveland (founder of the city of Cleveland, Ohio) of Canterbury, compiled by H.G. Cleveland, n.d.