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The transverse sinuses (left and right lateral sinuses), within the human head, are two areas beneath the brain which allow blood to drain from the back of the head. They run laterally in a groove along the interior surface of the occipital bone.
The name derives from its position at the back of the head, from the Latin ob, 'behind', and caput, 'head'. The occipital lobe is the visual processing center of the mammalian brain containing most of the anatomical region of the visual cortex. [1] The primary visual cortex is Brodmann area 17, commonly called V1 (visual one).
The head rests on the top part of the vertebral column, with the skull joining at C1 (the first cervical vertebra known as the atlas).The skeletal section of the head and neck forms the top part of the axial skeleton and is made up of the skull, hyoid bone, auditory ossicles, and cervical spine.
Cerebral perfusion pressure is the net pressure gradient causing cerebral blood flow to the brain (brain perfusion). It must be maintained within narrow limits; too little pressure could cause brain tissue to become ischemic (having inadequate blood flow), and too much could raise intracranial pressure .
The pressure is often experienced in the cheek area, eyes, nose, on one side of the head (temple areas), and can result in a severe headache. [ 2 ] When diagnosing a sinus infection, one can identify which sinus cavity the infection is located in by the term given to the cavity.
The vertebral arteries emerge as branches of the left and right subclavian arteries. They travel upward through transverse foramina which are spaces in the cervical vertebrae. Each side enters the cranial cavity through the foramen magnum along the corresponding side of the medulla. [57] They give off one of the three cerebellar branches.
Non-cardiac reasons for chest pain on the left side. The skin, nerves, muscles, bones, tendons, soft tissue, and cartilage all share real estate on the left side.
A, B: The early embryo turns onto its left side; B, C: Symmetry is retained by a further left turn in the anterior head region and a compensating right turn in the rest of the body. D, E: Growth of the optic tract leading to the optic chiasma. Colors refer to early embryo: Red=right side, blue=left side, black=dorsal, white=ventral.