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The posterior-opening fistulas may follow a devious, curving path with some even being horseshoe-shaped before opening in the posterior midline. [2] Fistulas can be described as anterior or posterior relating to a line drawn in the coronal plane across the anus, the so-called transverse anal line. Anterior fistulas will have a direct track into ...
The cerebellar vermis (from Latin vermis, "worm") is located in the medial, cortico-nuclear zone of the cerebellum, which is in the posterior fossa of the cranium. The primary fissure in the vermis curves ventrolaterally to the superior surface of the cerebellum, dividing it into anterior and posterior lobes.
Some sexually transmitted infections can promote the breakdown of tissue resulting in a fissure: syphilis, herpes, chlamydia and human papilloma virus. [5] Other common causes of anal fissures include: childbirth trauma in women, [6] anal sex, [7] [8] Crohn's disease, [6] ulcerative colitis, [9] and poor toileting in young children. [10]
This defect is also described as a groove in the anal canal wall and may occur after posterior midline fissurectomy or fistulotomy, or with lateral IAS defects. Rare causes of traumatic injury to the anal sphincters include military or traffic accidents complicated by pelvic fractures , spine injuries or perineal lacerations , insertion of ...
The falx cerebri is a strong, crescent-shaped sheet of dura mater lying in the sagittal plane between the two cerebral hemispheres. [3] It is one of four dural partitions of the brain along with the falx cerebelli, tentorium cerebelli, and diaphragma sellae; it is formed through invagination of the dura mater into the longitudinal fissure between the cerebral hemispheres.
Symptoms: Painless, firm mass lateral to midline, usually anterior to the SCM, which does not move with swallowing: Causes: Family history: Differential diagnosis: Vascular anomaly, dermoid cyst, thymic cyst [broken anchor], lymphadenopathy, lymphoma, HPV-related oropharyngeal cancer: Treatment: Conservative, surgical excision
Afferents of the lobe are the vestibulocerebellar fibers arising from either the vestibular nuclei or the vestibular nerve/ganglion directly.. Vestibular organs → vestibular nerve/vestibular ganglion first-order fibers (→ vestibular nuclei (synapse) → second-order fibers) → juxtarestiform body of inferior cerebellar peduncle → (ipsilateral) flocculonodular lobe of cerebellum (synapse ...
A laryngeal cleft or laryngotracheoesophageal cleft is a rare congenital abnormality in the posterior laryngo-tracheal wall. [1] It occurs in approximately 1 in 10,000 to 20,000 births. [ 2 ] It means there is a communication between the oesophagus and the trachea, which allows food or fluid to pass into the airway.