SLHS 261 Lecture 4 Outline of Last Lecture I. Midterm Outline of Current Lecture II. Central Nervous System A. Corticobulbar tract: i. innervation of faceii. bulbar= brainstemiii. Connections from UMN Cortical Neurons to Brainstem Cranial LMN (V, VII, XI, X B. Internal Capsule: i. Anterior Portion: face, jaw, tongue, velopharyngeal and laryngeal muscles ii. Posterior Portion: motor neurons in spinal cord efferent to arms and legs C. Cortical Spinal Tract: i. Begins in the primary motor cortex, crosses at the medulla, synapses on the spinal segment ii. CST important for timing, strength, speed of muscle contractions for head, neck, limb D. Directional Terms Dorsal (top) Anterior (front ) Posterior (back) Ventral (belly) III. Precentral Gyrus- Frontal Lobe A. Primary motor cortex- deals with movement planningIV. Postcentral Gyrus- Parietal Lobe A. primary somatosensory cortexThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.V. Functions of the Lobes A. Temporal Lobe= hearing, memories, emotions, language comprehension B. Parietal Lobe= sensory, language processing C. Frontal Lobe= executive decisionsD. Occipital Lobe= visionVI. Hydrocephalus- Too much cerebral spinal fluid in the brain, linked to head injuries or tumors, treated by draining the CSFVII. FOXP2: Critical Molecule for Speech- A. single mutation of an amino acidi. occurs developmentally ii. first identified in ‘KE family’iii. Sequencing of orofacial movements, articulations, etciv. Structural abnormalities in B.G.v. Broca’s also smaller and overactive Current
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