Philadelphia: Annual Weather Averages. July is the hottest month in Philadelphia with an average temperature of 26Â°C (79Â°F) and the coldest is January at 2Â°C (36Â°F) with the most daily sunshine hours at 10 in July. The wettest month is July with an average of 114mm of rain. Loading weather data.
When this movement occurs, the tension on the vocal chords changes, resulting in a different pitch of sound in the human voice. The second pair of joints are the cricoarytenoid articulations which create the movement of the arytenoid cartilage upon the lamina of the cricoid cartilage.he vocal ligament is located between the arytenoid and the thyroid cartilages. The conus elasticus stretches superiorly from the thyroid cartilage, the vocal ligament and the arytenoid cartilage inferiorly to the upper border of the cricoid cartilage.
To summarize, the exact cause of this condition is not clearly evident and may be multifactorial.A hypothesis is that mediation of the vagus nerve may alter the laryngeal tone and lower the threshold for stimuli to produce vocal cord spasm or to precipitate the abnormal adduction of vocal cords.