What does lordosis mean in animals?
Lordosis is a reflexive posture displayed by female mammals in response to male sexual stimulation to facilitate intromission. The lordosis reflex is essential, but studying the drive to mate is compromised in the absence of robust lordosis.
What is human lordosis?
Healthy adult humans have an anterior (forward) curvature of the lower (lumbar) vertebral column known as lumbar (or lumbosacral) “lordosis.” A lordosis is any anterior-ward convexity in the vertebral column, and the normal adult vertebral column has two of them – one in the lumbar region and one in the cervical region …
What region in the brain of the female rat is especially important for lordosis behavior?
The VMN of the rat brain, especially the ventrolateral part of the VMN (VL-VMN), abundantly expresses estrogen receptor-α (ERα) but not ERβ (Shughrue et al., 1997; Osterlund et al., 1998). The actions of estrogens binding to ERα are essential for the induction of lordosis behavior.
What is Lordotic curvature?
Lordosis is excessive curvature in the lumbar portion of the spine, which gives a swayback appearance. The spine is divided into several sections. The cervical vertebrae make up the neck. The thoracic vertebrae comprise the chest section and have ribs attached.
What is the difference between lordosis and kyphosis?
Lordosis (also known as swayback) is when the lower back, above the buttocks, curves inward too much, causing the child’s abdomen to protrude and buttocks to stick out. Kyphosis is when the upper spine curves too far outward, forming a hump on the upper back.
What is lordosis posture?
Summary. Lordosis is an exaggerated inward curve of the spine, often in the neck or lower back. There are several causes and risk factors, including congenital conditions, uneven posture, and injuries. A doctor can often diagnose lordosis with a physical examination, and imaging scans can help.
How does lordosis affect the body?
But if your curve arches too far inward, it’s called lordosis, or swayback. Lordosis can affect your lower back and neck. This can lead to excess pressure on the spine, causing pain and discomfort. It can affect your ability to move if it’s severe and left untreated.
Which of the following hypothalamic regions is critical for the display of lordosis Behaviour by female rats?
Abstract. The lordosis reflex, a stereotypic posture adopted by female rats during sexual behavior, requires the convergence of a hormonal signal, estrogen, with a descending neural pathway from the ventromedial hypothalamic nucleus (VMH).
What region in the brain of the male rat is especially important for reproductive behavior?
The MPOA is generally believed to be one of the most important areas in the male rat forebrain involved in regulating masculine sexual behavior such as mounting, intromission, ejaculation (Kondo, et al., 1990) and copulation (Burns-Cusato, et al., 2004; Paredes and Vazquez, 1999).
What is lordosis of the spine?
The spine normally curves at the neck, the torso and the lower back area. When the spine curves too far inward, the condition is called lordosis or swayback. Lordosis can cause pain that sometimes affects the ability to move. It is usually found in the lower back. Lordosis can affect people of any age.