An example of a pivot joint is the joint between the atlas and axis (C1 & C2) vertebrae, the rotation around each other allows our heads to âpivotâ left and right. 5. Ball and socket joints: This type of joint allows side to side, back and forth, and rotational movement.
At low bladder volumes, afferent firing is low, resulting in excitation of the outlet (the sphincter and urethra), and relaxation of the bladder. At high bladder volumes, afferent firing increases, causing a conscious sensation of urinary urge.
In adults, blocked tear ducts, which cause tears to build up in the eyes, may be caused by one or more conditions. They include: 1  Thickening of the tear duct lining. 2  The tear ducts may become narrow due to thickening, swelling, or inflammation of their lining. 3  This is called primary acquired nasolacrimal duct obstruction (PANDO) and is most common in women over the age of 40.