Oblique Muscle The two paired abdominal muscles on each side of the abdominal wall – the external and internal obliques provide trunk flexion and rotation. Synonyms: Symptoms: Muscle cramps, pain, bruising, stiffness Conditions:. Brown syndrome, strain.
Oesophagus The oesophagus is a fibromuscular tube which takes food from the pharynx to the stomach. Synonyms:. Gullet, Gorge Symptoms: Difficulty swallowing, heartburn, regurgitation, inflammation. Conditions: Barrett’s oesophagus, Cancer, Oesophagitis
Oral Cavity The oral cavity is the first part of the digestive system. Its boundaries are the lips , the palate and the cheeks, and it contains the teeth, teh tongue and the salivary glands secrete into it. Synonyms: mouth, buccal cavity Symptoms: Problems with taste, dysphagia, numbness, ulcers Conditions: Cancer, gingivitis, xerostomia (dry mouth)
Orbicularis oculi The muscle in the face that closes the eyelids. Synonyms: Symptoms: Weakness, headaches, eyestrain Conditions: paralysis, blepharospasm
Orbicularis Oris A complex of muscles in the lips encircling the mouth Synonyms: kissing muscle Symptoms: Difficulty opening and closing mouth, and speaking Conditions: Satchmo’s syndrome