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The cruciate ligament of the atlas (cruciform ligament) is a cross-shaped (thus the name) ligament in the neck forming part of the atlanto-axial joint. It consists of the transverse ligament of atlas, a superior longitudinal band, and an inferior longitudinal band. The cruciate ligament of the atlas prevents abnormal movement of the atlanto ...
The atlas ossifies from three centers. The atlas is usually ossified from three centers. [6] Of these, one appears in each lateral mass about the seventh week of fetal life, and extends backward; at birth, these portions of bone are separated from one another behind by a narrow interval filled with cartilage.
The atlanto-axial joint is a joint between the atlas bone and the axis bone, which are the first and second cervical vertebrae.It is a pivot joint that provides 40 to 70% of axial rotation of the head.
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Spectrum Health Lakeland was a nonprofit community-owned health system in southwest Michigan. [3] The health system comprised three hospitals, an outpatient surgery center, a regional cancer center, rehabilitation centers, two long-term care residences, home care and hospice services, and 34 affiliate physician practice locations.
Built circa 1843 by Michigan State Congressman Robert P. Aitken (1819–1873) and later owned by his son U.S. Congressman David D. Aitken (1853–1930). Still a private residence. Still a private residence.
The state averages from 30–40 inches (76–102 centimetres) of precipitation annually. Snow cover tends to be intermittent in the southern part of the state, but persistent in northern Lower Michigan and especially in the Upper Peninsula. Michigan USDA Plant Hardiness Zone Map. The entire state averages 30 days of thunderstorm activity per year.
The Norton Mound group was the center of Hopewellian culture in that area, from ca. 400 B.C. to A.D. 400. These mounds were probably constructed in the first century AD. [3] The name "Norton Mounds" comes from Captain A.N. Norton, who owned this property in the 1800s. [4]