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4 ημέρες πριν · The spinal nerve extends from the inferior end of the brain stem and passes through the foramen magnum of the skull into the neck. In the neck, the spinal cord passes through the vertebral foramen of the cervical vertebrae, which surround and protect its delicate nervous tissue.
18 Οκτ 2023 · The main artery supplying the eye is the ophthalmic artery, while the main nerves are the optic (CN II), oculomotor (CN III), trochlear (CN IV), trigeminal (CN V), and abducens (CN VI) cranial nerves. They reach the eye via three holes located at the back wall of the orbit.
30 Οκτ 2023 · Nerves of the head. Since the head is such a ‘vast’ anatomical region, it’s innervation is quite extensive. For the purposes of this page, we’ll only talk about the relevant nerves for the previously mentioned anatomical structures. The nerves in the head originate from three main sources: Trigeminal nerve (CN V) Facial nerve (CN VII)
The Head. Nerves of the Head. The nerves of the head include the sympathetic and parasympathetic innervation to the head and neck, as well as the three branches of the trigeminal nerve: ophthalmic, maxillary and mandibular. The sympathetic innervation begins in the spinal cord.
30 Οκτ 2023 · Deep layer. Deepest layer. Sources. + Show all. Anterior neck muscles. The anterior neck muscles are a group of muscles covering the anterior aspect of the neck. They are further divided into 3 subgroups: The superficial muscles are the most superficial in the anterior neck, and include the platysma and sternocleidomastoid.
4 ημέρες πριν · The neck muscles, including the sternocleidomastoid and the trapezius, are responsible for the gross motor movement in the muscular system of the head and neck. They move the head in every direction, pulling the skull and jaw towards the shoulders, spine, and scapula.
24 Ιουλ 2023 · The ansa cervicalis (“handle of the neck” in Latin), is a loop of nerves that lies superficial to the internal jugular vein, composed of the C1 to C3 nerves. More specifically, one end of the loop, the superior root, is derived from C1 (and possibly C2, depending on the literature), while the other, the inferior root, comes from C2 and C3.
