PDF-Cranial Nerves Spinal Cord and Reflexes

1 BIOL 2210L Unit 11 Authors Terri Koontz and Anna Gilletly CNM Biology Department Creative Commons Attribution NonCommercial 40 International License Terms to Know for Unit 1 1 Cranial Ner. This tutorial will allow you to learn about the 12 pairs of cranial nerves in the human body.. An introduction to the cranial nerves is followed by a screen which allows you to click on the nerve name to learn the functions and tests for the assessment for each nerve.. Eleventh Edition. Chapter 13. The Spinal Cord, Spinal Nerves, and Spinal Reflexes. Clicker Questions. What is the minimum number of neurons in a reflex arc?. 1. 2. 5. 7. What is the minimum number of neurons in a reflex arc?. Spinal Cord Anatomy. Extends from the foramen magnum of the skull to the first or second lumbar vertebra. Provides a two-way conduction pathway from the brain to and from the brain. 31 pairs of spinal nerves arise from the spinal cord. Sarah Cronin. Matt . hawkins. Tyler . plas. Marissa . kramer. . The adult human brain contains about . 98%. of the body’s neural tissue. . A typical brain weighs about . 1.4kg. The brain of a male is usually about 10% . 1. The Nervous System can be divided in: . Central Nervous System (CNS). Brain and Spinal Cord. Peripheral Nervous System (PNS). Cranial and spinal nerves, ganglia, sensory receptors. 2. Division of the Peripheral Nervous System. There are 12 pairs of cranial nerves.. Name of the Cranial Nerves. I. Olfactory n.. II. Optic n.. III. Occulomotor n.. IV. . Trochlear. n.. V. Trigeminal n.. VI. . Abducent. n.. VII. Facial n.. VIII. . Somatic Nervous System . (conscious activities) . Skin, skeletal system .  . Autonomic Nervous System . (unconscious activities); heart, viscera, glands                                   . 31 pairs arise from spinal cord. Five groups correspond to regions of spinal cord and vertebrae. Cervical 8 pr.. Thoracic 12 pr.. Lumbar 5 pr.. Sacral 5 pr.. Coccygeal 1 pr.. Structure of a Nerve. for copying. CRANIAL NERVES. 12-pair. named “cranial” because each passes thru a foramina of the cranium. part of PNS. each with roman numeral (order from anterior .  posterior in which nerves arise from base of brain) & a name that indicates nerve distribution. Introduction :. 2 General Classifications. Complete Lesion . A lesion to the spinal cord where there is no preserved motor or sensory function below the level of lesion. Incomplete Lesion. A lesion to the spinal cord with incomplete damage to the cord. There may be scattered motor function, sensory function or both below the level of lesion. Department of Morphology and General Pathology. Organization of the nervous system. . 1. . Central. . Nervous. . System. (. CNS. ) . a. Brain. b. Spinal cord. 2. . Peripheral Nervous System. (. PNS. HONORS ANATOMY & PHYSIOLOGY. Spinal Cord. w/spinal nerves contain neural circuits that mediate some of your most rapid reactions to environmental changes. Protective Structures. 2 types of CT coverings surround & protect delicate nervous tissue. January2015 SCI Fact Sheet This fact sheet is intended to be a starting point for understanding the normal functions of the spinal cord and how those functions might change after spinal cord injury (S are labeled . from superficial to deep as follows: . The outermost . dura. mater . (tough mother) forms a sac that encloses the entire . brain and spinal cord. .. The middle . covering is . a delicate avascular covering .